Having played both, they play the same, but saying that every machine plays differently. Have had and known other collectors who have owned multiple of a particular title and regardless of which was in better condition on occasion one machine would play *better*. Some feel clunkier, some you can get away with particular shots while others will drain, its just slight differences in construction.
That said, I would want a remake for the display. Pinsound is nice, but WPC95 sound quality does not feel lacking to me, if it were TZ with pre-dcs that would be a different story.
Repair on both is mixed. Beaglebone boards are easy and cheap to get. WPC95 parts are increasingly becoming obsolete so in 10 years, repairing one may not be an option. After market should continue to exist, but you may run into an issue like with the A/V board where no one makes it for years on end (rottendog's is supposed to be coming back out soon). To say that the original is easier to repair does not take into account that the parts situation will continue to get worse due to it being very antiquated.
As for the original being an *original* it is more like the ship of theseus. Unless you get an huo or nib example, any restored example is not really original and frankly you are paying more for what increasingly amounts to the same thing. The main difference being the hardware driving it.