I have always wanted a list of all items that each specialization can create and thought it may be handy for others to determine what spec to enter into. Here is the list of items that each specialization can make, separated out depending on whether you need engineering to use the item. Some items are BOP and would require the engineering specialization to make but not necessarily to use after it is made if you wish to drop the profession or specialization.
As Blizzard has not added anything requiring a specialization for many expansions, the choice between the two will likely be for collecting and selling toys, mounts and transmogs instead of an advantage in PVE / PVP. I have listed the category that each item falls in for collection purposes.
- Gnomish Engineer can make:
- Everyone can use:
- Mount : Geosynchronous World Spinner
- Pet : [item=60216]
- Blacksmithing Recipe : Plans: Inlaid Mithril Cylinder
- [item=10645]
- Any Engineer can use:
- Cloth BoP : [item=10545]
- Cloth BoE : [item=23825]
- Cloth BoE : [item=10724]
- Cloth BoE : [item=10726]
- Leather BoE : [item=10721]
- [item=23841]
- [item=10716]
- [item=10720]
- [item=10725]
- Gnomish Engineers can use:
- Toy Portal : [item=30544]
- Toy Portal : [item=18986]
- Toy : [item=40895]
- Toy : [item=40727]
- Toy : [item=18660]
- Cloth BoP : [item=23828]
- Leather BoP : [item=23829]
- [item=23835]
- Goblin Engineer can make:
- Everyone can use:
- Mount : Depleted-Kyparium Rocket
- Pet : [item=59597]
- Alchemy Recipe : Recipe: Goblin Rocket Fuel
- [item=10727]
- Any Engineer can use:
- Cloth BoP : [item=10543]
- Cloth BoE : [item=7189]
- Cloth BoE : [item=10588]
- Mail BoP : [item=10542]
- [item=23826]
- [item=23827]
- [item=10646]
- [item=10577]
- [item=10587]
- [item=10586]
- Goblin Engineers can use:
- Toy Portal : [item=30542]
- Toy Portal : [item=18984]
- Cloth BoP : [item=23838]
- Mail BoP : [item=23839]
- [item=42641]
- [item=23836]
- [item=63396]
Many people have asked which specialization they should choose, hopefully this list should help them decide.
If you are going for transmogs, then you would need a cloth and a leather wearer to go Gnomish while a cloth and mail wearer go Goblin.
If you are going for mounts and/or pets, you would need one character in each specialization, but the mounts and pets are also not BoP so you can find a friend to make them for you or buy them off the AH.
Once you have the transmogs, mounts and pets you want crafted, you can switch your spec to whichever spec has the toys you want. All the toys can only be used by the specialization that makes it.