hmmmmmmmmmmmm, never ridden an alpine but have compared an enduro and my switchback back to back.
The enduro was longer, but with a shorter stem, so less weight up front.
The switchback is about an inch shorter on the TT, but 20mm longer on the stem (90mm vs 70mm) and has a steeper angles, thus bringing the front wheel much closer in and shifting your weight forewards.
Whats the relative setup of your two? I found that full sussers as short as the hardtail didn’t work out for me. The closest thing i demo’d to the medium switchback was a large giant reign-X! Thats in terms of how it felt to ride, both bikes turn me into a hooligan, boosting off every little treestump at the side of the track 🙂
So maybe the solution is play arround with a slightly longer stem on the alpine compared to the pitch?