We'd have to define "good results" with respect to Beutler. Edge effects are one thing. There's also granularity (among other things) and tone reproduction.

The big thing about Pan-X seems to have been that it was a fine grained film with good resolution which also had a long scale of moderate contrast. This is in comparison with the shorter scale and high contrast more typical of slow, fine grained films. But that was then.

I think it is just another one of those old films people swear were "better" than the newer films.

On balance, I'd agree with Thomas/Roger, particularly concerning current films. The most observable difference in image structure characteristics is granularity. And excluding the shoulder, characteristic curves for most contemporary 100-400 speed films are substantially the same.