Well, I have to say I'm happy with the SLCD so far, few pics below but they don't do the differences justice...
- SLCD is much crisper/sharper
- Whites are much better on the SLCD
- AMOLED is 'punchier' colours but the SLCD is 'brighter' (I find that hard to explain)
- AMOLED blacks are (obviously) much better (see dark pic)
I've put in pics of the sideways whites in the browser, the pics show the opposite for some reason but the AMOLED is a bit yellower (I know, it doesn't really look it) The SLCD wins this bit by far!
So, a mixed bag, SLCD wins for sharpness, true whites and general brightness. AMOLED for punchy colours and..umm possibly battery life but I'm not going to check that! The pixels are really obvious on AMOLED when you compare the two. Viewing angles are great on them both, both win in one direction but you'd never place your phone at those sorts of angles to notice the difference.
Sunlight legibility is on par, it's really too close to call.
A few pics (yes, I know they're a bit pants!)
It's now all rooted happily (HBOOT 0.93) using unrevoked 3, custom ROM & some power tweaks added, just taking ages to get my apps/contacts back on!