Hi,
Bought a steel a few weeks ago thought I'd add my bit as i know how hard it is to find reviews on this bike!
Ive ridden the 905 (but not the alu 19.) for me it was a toss up between the 905 and the steel 19, as they are about the same price.
In my experience the 905 is quicker to accelerate and lighter too, but shook me to bits on the rough stuff, the steel feels slightly more compliant.
On the steel 19 you also get the option to change geometry which ive now set up same as the 905 by shortening the stays.
Climb like a dream, and i can get back over the saddle for really steep stuff, drop offs are a breeze on both bikes.
I'm 5"10 (178cm) 12 stone 1 lb (77kg), and ride a Medium.
I set the forks to 120 psi top and bottom with couple turns of rebound on so not damped down too much, makes it nice and lively and dosent bottom out (unless you try a low speed 3 foot wall drop in the wrong gear and nearly go over the handlebars…. 😯 )
Its a great bike, I still cant keep up with the stumpys downhill though despite the claims!
ta