My OH and I have owned a Salsa Spearfish and Spesh Camber (& I currently have Evo version of the latter). My OH currently has a Santa Cruz Superlight. We’re around the same height, so borrow each other’s bikes now & then – in our experience, the Spearfish was the best climber on smoother terrain, but the Camber felt easier climbing on rough trails. The Superlight is built up with quite a chunky build, so it’s extra 3lbs of weight goes against it on climbs. For descents, I’d say the Superlight (with 120mm fork) and Camber are more confidence inspiring, but the Cambers suspension is much better for braking grip and just grip in general. The camber was an absolute flyer around trail centres and at normal trail riding speeds it was great on unsighted natural trails. I only felt like it ran out of suspension whilst flying down a couple of rough rocky descents in the Peak District (but my OH never experienced this!), and in fairness the Camber Evo fitted with a 120mm Pike feels a bit overwhelmed on the same trails when travelling at speed.
FWIR, our Camber Carbon Expert model came in at 27lbs with dropper for a SRAM X9/XT 2×10 type build and 1750ish gram wheelset. I think Bikescene might have some carbon frames in their sale(?) that might be worth a gander.
We sold the carbon Camber as my OH doesn’t like the super active Specialized FSR suspension on the climbs, as she doesn’t like faffing with Propedal. She bought a 2nd hand Superlight and had the shock Push tuned, and she is really pleased with it – although to me, it feels a bit more like a ride around/hop over obstacles bike than bikes like the Camber or Salsa Horsethief. Having said that, for a very nimble bike, the Superlight does have a reasonably confident descending feel, and around trail centres it’s a ripper.
HTH