The montare looks to be the lighter bike as you've probably guessed.

For me, it really comes down to the fork. Is the suntour any good?
I'd rather rather pay a small weight penalty and sacrifice a bit of component quality in favour of a quality ride.
But then the fork could be 63mm of loveliness.. And the rest of the spec is nice.

I'd recommend waiting till november and getting a ride on both bikes, otherwise it's pretty much just speculation.