Worse advice couldn't have been given, IMNSHO.
A rear STB, while a noticable difference, won't make the car tail happy all on its own.
A front STB is, as mentioned above, ornamental. ****, I used to make and sell them, and even I would try to talk customers out of a FSTB for Gen 1 and 2 cars. If you felt a difference, it was most likely because you didn't want to think you spent money on something that doesn't make a noticable difference.
Wheel hop can be solved with a Gen 3 subframe swap, regardless of type of differential.