The dialog of Chen, Li Li, and Mudmug is different, depending on the order you accept these three quests:
Clear the Way from Chen
Barrels, Man from Li Li
The Fanciest Water from Mudmug
There is a lot of overlap when a character is picked first or third; most of the unique lines are when a character is picked second.
After completing these three quests, this also affects the order of the bosses you fight in the next quest in the chain, Cleaning House
If you pick Chen first, Li Li second, Mudmug third:
Chen Stormstout says: See you on the other side, <name>.
/script PlaySoundFile("Sound/creature/ChenStormstout/VO_CHEN_EVENT_BONKERS_BREWERY_01.OGG")
Chen Stormstout yells: Mudmug, Li Li... follow me!
/script PlaySoundFile("Sound/creature/ChenStormstout/VO_CHEN_EVENT_BONKERS_BREWERY_02.OGG")
Li Li says: I'm going ahead to see if there's anything I can do to help.
/script PlaySoundFile("Sound/creature/LiLiStormstout/VO_LI_LI_EVENT_BONKERS_BREWERY_01.OGG")
Li Li yells: Hey, you dumb old uncle! You left me behind!
/script PlaySoundFile("Sound/creature/LiLiStormstout/VO_LI_LI_EVENT_BONKERS_BREWERY_04.OGG")
Mudmug says: The brewery's got a second entrance, over yonder.
/script PlaySoundFile("Sound/creature/Mudmug/VO_MUDMUG_EVENT_BONKERS_BREWERY_01.OGG")
Mudmug says: Where'd those other two go? Did they leave me behind? Don't nobody care about Mudmug?
/script PlaySoundFile("Sound/creature/Mudmug/VO_MUDMUG_EVENT_BONKERS_BREWERY_03.OGG")
Chen first, Mudmug second, Li Li third:
Chen Stormstout says: See you on the other side, <name>.
/script PlaySoundFile("Sound/creature/ChenStormstout/VO_CHEN_EVENT_BONKERS_BREWERY_01.OGG")
Chen Stormstout yells: Mudmug, Li Li... follow me!
/script PlaySoundFile("Sound/creature/ChenStormstout/VO_CHEN_EVENT_BONKERS_BREWERY_02.OGG")
Mudmug says: The brewery's got a second entrance, over yonder.
/script PlaySoundFile("Sound/creature/Mudmug/VO_MUDMUG_EVENT_BONKERS_BREWERY_01.OGG")
Mudmug says: I suppose I'll be off then. You a-comin', Li Li?
/script PlaySoundFile("Sound/creature/Mudmug/VO_MUDMUG_EVENT_BONKERS_BREWERY_04.OGG")
Li Li says: I'm going ahead to see if there's anything I can do to help.
/script PlaySoundFile("Sound/creature/LiLiStormstout/VO_LI_LI_EVENT_BONKERS_BREWERY_01.OGG")
Li Li yells: Hey, you old jerks! You left me behind!
/script PlaySoundFile("Sound/creature/LiLiStormstout/VO_LI_LI_EVENT_BONKERS_BREWERY_03.OGG")
Mudmug first, Chen second, Li Li third:
Mudmug says: The brewery's got a second entrance, over yonder.
/script PlaySoundFile("Sound/creature/Mudmug/VO_MUDMUG_EVENT_BONKERS_BREWERY_01.OGG")
Mudmug says: I reckon I'll see you over there.
/script PlaySoundFile("Sound/creature/Mudmug/VO_MUDMUG_EVENT_BONKERS_BREWERY_02.OGG")
Chen Stormstout says: See you on the other side, <name>.
/script PlaySoundFile("Sound/creature/ChenStormstout/VO_CHEN_EVENT_BONKERS_BREWERY_01.OGG")
Chen Stormstout says: I'd better catch up (with) Mudmug.
/script PlaySoundFile("Sound/creature/ChenStormstout/VO_CHEN_EVENT_BONKERS_BREWERY_05.OGG")
Li Li says: I'm going ahead to see if there's anything I can do to help.
/script PlaySoundFile("Sound/creature/LiLiStormstout/VO_LI_LI_EVENT_BONKERS_BREWERY_01.OGG")
Li Li yells: Hey, you old jerks! You left me behind!
/script PlaySoundFile("Sound/creature/LiLiStormstout/VO_LI_LI_EVENT_BONKERS_BREWERY_03.OGG")
Mugmug first, Li Li second, Chen third:
Mudmug says: The brewery's got a second entrance, over yonder.
/script PlaySoundFile("Sound/creature/Mudmug/VO_MUDMUG_EVENT_BONKERS_BREWERY_01.OGG")
Mudmug says: I reckon I'll see you over there.
/script PlaySoundFile("Sound/creature/Mudmug/VO_MUDMUG_EVENT_BONKERS_BREWERY_02.OGG")
Li Li says: I'm going ahead to see if there's anything I can do to help.
/script PlaySoundFile("Sound/creature/LiLiStormstout/VO_LI_LI_EVENT_BONKERS_BREWERY_01.OGG")
Li Li yells: See you there, Uncle Chen!
/script PlaySoundFile("Sound/creature/LiLiStormstout/VO_LI_LI_EVENT_BONKERS_BREWERY_05.OGG")
Chen Stormstout says: See you on the other side, <name>.
/script PlaySoundFile("Sound/creature/ChenStormstout/VO_CHEN_EVENT_BONKERS_BREWERY_01.OGG")
Chen Stormstout yells: Li Li, Mudmug, wait up!
/script PlaySoundFile("Sound/creature/ChenStormstout/VO_CHEN_EVENT_BONKERS_BREWERY_03.OGG")
Li Li first, Chen second, Mudmug third:
Li Li says: I'm going ahead to see if there's anything I can do to help.
/script PlaySoundFile("Sound/creature/LiLiStormstout/VO_LI_LI_EVENT_BONKERS_BREWERY_01.OGG")
Li Li yells: Uncle Chen, Mudmug! Race you there!
/script PlaySoundFile("Sound/creature/LiLiStormstout/VO_LI_LI_EVENT_BONKERS_BREWERY_02.OGG")
Chen Stormstout says: See you on the other side, <name>.
/script PlaySoundFile("Sound/creature/ChenStormstout/VO_CHEN_EVENT_BONKERS_BREWERY_01.OGG")
Chen Stormstout yells: Li Li, wait up!
/script PlaySoundFile("Sound/creature/ChenStormstout/VO_CHEN_EVENT_BONKERS_BREWERY_04.OGG")
Mudmug says: The brewery's got a second entrance, over yonder.
/script PlaySoundFile("Sound/creature/Mudmug/VO_MUDMUG_EVENT_BONKERS_BREWERY_01.OGG")
Mudmug says: Where'd those other two go? Did they leave me behind? Don't nobody care about Mudmug?
/script PlaySoundFile("Sound/creature/Mudmug/VO_MUDMUG_EVENT_BONKERS_BREWERY_03.OGG")
Li Li first, Mudmug second, Chen third:
Li Li says: I'm going ahead to see if there's anything I can do to help.
/script PlaySoundFile("Sound/creature/LiLiStormstout/VO_LI_LI_EVENT_BONKERS_BREWERY_01.OGG")
Li Li yells: Uncle Chen, Mudmug! Race you there!
/script PlaySoundFile("Sound/creature/LiLiStormstout/VO_LI_LI_EVENT_BONKERS_BREWERY_02.OGG")
Mudmug says: The brewery's got a second entrance, over yonder.
/script PlaySoundFile("Sound/creature/Mudmug/VO_MUDMUG_EVENT_BONKERS_BREWERY_01.OGG")
Mudmug says: I suppose I'll be off then. You a-comin', Chen?
/script PlaySoundFile("Sound/creature/Mudmug/VO_MUDMUG_EVENT_BONKERS_BREWERY_05.OGG")
Chen Stormstout says: See you on the other side, <name>.
/script PlaySoundFile("Sound/creature/ChenStormstout/VO_CHEN_EVENT_BONKERS_BREWERY_01.OGG")
Chen Stormstout yells: Li Li, Mudmug, wait up!
/script PlaySoundFile("Sound/creature/ChenStormstout/VO_CHEN_EVENT_BONKERS_BREWERY_03.OGG")