Victorystardrop

Im starting to save my pennies for a b16a2, but ive searched with no luck as to how you can tell the difference between the 99si b16a2 and the 92-95 ones? (on most sites Ive checked theyre both listed as b16a2=me confused) Because I need an obd2 to stay legal. (keep in mind im still pretty ignorant on the whole topic)