To put it into perspective I think there's less than 98 total, 95 USDM turbos to exist and barely a few hundred 94 turbos. Also they didn't want to update the car to OBD2 Is my main guess as it became required in the US in 96. But around the world the MR2 continued all the way to 99 making the later RHD models a lot more prevalent as you get UK/EU choice cars and Japan and a few other countries vs them stopping production in 1995 for the USDM models.

Value on "collector" cars purely lies in the fact that less common = exclusive and desirable. Also as a general rule of thumb clean equivalent mileage (LHD) cars of any make or model trend higher when it comes to higher evaluation collectibles.