the trouble with a dirt frame is they normally have relatively steep angles. This makes them good for jumping, but rather comprimised for riding DH.
My hardtail rides everything, from enduro to full on DH courses. I’d not hesitate taking it down either, which is why I bought a beefy steel frame and some big forks (note, at 160mm it is, to my mind, overforked, but I can’t be arsed with the hassle of swapping them to shorter forks).
I used to have a 13″ P3 (I still own it, in fact) that was also used for everything. It probably meets the description of ‘jump frame with 100mm forks). To compare it to the surge (last rode it a year ago, but still got a pretty good idea) it was
lower (13″ vs 17″ frame) so easier to get weight behind
had a compromised steering/foot overlap
was better for jumping
blew through its fork travel on a dh track
too small to ride around on (no way to get a long enough set post to use properly)
too steep to be comfortable riding down steeper dh trails
The P3 is a better jump bike, no doubt, but as a freeride bike, doing some jumps, doing some dh, riding some singletrack, I think a long travel, slack hardtail is hard to beat (if you want a hardtail)
incidentally, winstanleys has last year’s core 1 for £900 – which has a much better spec than the core2. worth a look