I've been liking how my SLT feels fit-wise lately, so I drew a couple of seat tubes in CAD comparing the relative saddle position of my Trek and the SLT.
The SLT has a 74° seat tube angle, and the Trek is 72.5° stock but it's likely sitting around 73° now with a slightly lowered front end. At my saddle height of around 30" (76cm) that means that given the same seat post, saddle, and seat post clamp position on the rails, I would be about .57" (~1.5cm) closer to the BB on the SLT than on the Trek. So I'm going to try and move my saddle forward about that much and see how things feel tonight.