I'm not near my notes right now but I think the Stock III slide is 13.2oz (S2 is 13.7, 1911 in .45 is also 13.2) while the Limited Custom was 12.3 (almost identical to S1 or SP-01). The TSO slide is also 13.7 if I remember right, the extra length being offset by the slimmer SP-01 profile in comparison to a S2. I would expect this new gun to have a slide at 14oz.
I'm obsessed with frame, complete upper, barrel, and slide weights.