Never did any edgeholding comparison tests; 440C would of course still be a very good steel if the hardening process was done right.
But judging by the overall poorly made knives Puma makes these days my guess would be that they don't put too much effort in the heat treat as well.
But i can be wrong about that one of course,
Edgeholding aside the big difference between today's Puma's and the models of yesteryear is in the fit & finish, something you cannot judge from a catalogue or the internet.
I only collect older Puma's, and with old i mean "as old as i can get them".
To a non-knife person new & old production Puma would probably seem about similar, but when you have even the faintest idea of quality you will know the difference when you hold one of the older knives in your hand.
BTW; same goes for older Gerber, Rigid, and original BenchMark knives.