It's worth it if the price is right, I wouldn't think they're too expensive at over 15 yrs old. It was a popular upgrade for the 94-95's back then.
Primary clutches are similar design, but the 97XT clutch likely has some upgrades, and it may or may not have the same tuning calibration as the 94 clutch. Either clutch would work fine, at this age the better one is likely whichever has the bushings/rollers/weights/spring in better condition. Only way to tell what you really have is to take it apart and inspect/measure.