I’ll agree with the assesment that the 38 “needs to get up a little speed first” — it’s not a “quick” car, but it drives easily around 40-45, and we’ve had it up around 55 a few times. I tend not to drive brass cars faster than that — (two wheel brakes, 100+ year old steel, etc). The car has lots of power, and is a bit smaller than the larger car, so it performs well. I’ve always seen numbers around 65hp & 82hp respectively for the two models.
As for quantity, production may be have been close to 50/50, but there appear to be far more 48s and fewer 38s out there today. That said — there are two 38s here in Southeast PA, and we were both on the recent Hershey Hangover tour.