I think it would be fine if you are riding solo or in a group with similar bikes, you’ll struggle if the group are on XC bikes though.
The build will effect it as well, go tubeless with lighter wheels and tyres and you’ll see a big change in how the bike rolls
I have an 08 SX and an 08 Enduro and have owned 04/5 enduros and 06 S-works enduro before.
My SX was at 35lb with Vans and DHX coil, have just put the Vans on the Enduro and it weighs a smidge over 30lbs and makes for a good XC/AM syle fun bike:
And yesterday put Totems on the SX and it weighs 35.75lb, I am yet to ride it though:
If you’re super worried about weight, the Enduro might be a better choice?
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I originally bought the SX as my bike for all but found it didn’t suit and bought the enduro later in a sale – so that’s probably the answer you were looking for?