I have a 1971 Grizzly with maple limb laminations, and a ???? Super Grizzly made with Fascor (I am trying to nail down the date in another post if anyone had ideas-shameless plug-).
They seem pretty much the same to me, other than the Fascor adds weight to the bow. Given the 5-6# difference in the two bows, one seems just as fast as the other. My guess is that Fascor is tougher than just plain maple, maybe less likely to be damaged from rough handling, but it is mostly marketing.
RonP