When you cast Giant form 1 you gain +6 size bonus to str and become large. Giant form 2 adds huge forms to the ones you can select but also keeps the large ones. So if I use giant form 2 and choose a large form, because I used the 2 spell and not the first, despite being the same as GF1, do I get +6 or +8 str?
If you cast Giant Form 2 you have the option to select form several sizes (from large to huge) but it clearly states:
You gain the following abilities:
- +8 size bonus to Strength
- -2 penalty to Dexterity
- +6 size bonus to Constitution
- +6 natural armor bonus
- low-light vision
- +10 foot enhancement bonus to your speed
So you don´t have option to choose your STR bonus, only the size according to the creature you choose.
Font: Giant Form