1ggte existe 3sgte was the engine used in the ST165 and any celica gt4 for that matter. 3tgte is older.
3tgte= 1.8litre turbo 4 cyl
3sgte= 2.0 litre twin cam 4cyl
1ggte= 2.0 litre twincam inline six cylinder.
All of these engine don't have specific power outputs as there are many different version ie 3sgte range anywhere form 150 odd to 208 kw. The same cirumstance happens for the 1ggte as diff generations run different boost i think the Gen 111 which runs 10psi puts out around 150-160 kw.
I know pretty much nothing about the 3tgte so i'll leave that for someone else