TS2 sounds warmer/more romantic, less accurate/analytical than the Super 3.
TS2 is slightly more efficient and will play louder than the Super 3.
Within it's volume range the Super 3 should have better dynamics (being the smaller, lower mass driver).
Without a whizzer the Super 3 should image slightly better.
Keep in mind that both being Fostex single driver, bass reflex designs by the same vendor that they will sound much more the same, than different.