Many fans still consider the Tekken 2 soundtrack—specifically the "Arranged" version—to be the best in the series.
Explained: PSP ISO Vs Eboot Files & How To Install/Play Them Tekken 2 Psp Eboot
None major. Some users report very minor audio delay in character select. Switching to “Stereo” instead of “Surround” in the PS1 emulation settings fixes this. Tekken 2 Psp Eboot