I gigged a WT 800 a few years ago on three or four gigs and used to have a WT 400 for many years.
Not sure if that WT 800 was the WT 800 C you're talking about, no Eden expert here. Was ca. 36 - 38 pounds, pretty heavy thing.
Have also used the Puma 900 for a year, but sold it last year.
Very different sounding amps, but IMO, the WT 800 is much fatter, warmer, has more punch and oomph. The Puma is a very (!) open, glassy, and transparent sounding amp. I'd describe it as super modern, doesn't have the Eden warmth and punch.
It allows you to dial in a slightly rounder tone via the "taste" knob, but that open, modern, glassy tone is basically always there, which was the reason why I sold it. Especially in louder rockish contexts, I wasn't happy with the Puma. On the other hand, it's not really built to rock out like crazy, that's probably what the Tecamp Black Jag is for.