Alek – Kilroy recently upgraded his waterproof from a Crux to a ME Tupilak.
Kevin, to be honest it is six to one and half a dozen the other between the two jackets in all honesty. Both are made of the same material and are reinforced in particular areas (i.e designed for mountaineering/climbing in).
Changabang has removable snow skirt, Tupliak has an Alpine fit (slimmer, less of a baggy feel), both have a helmet comparable hood.
If you are set on getting one of the two, then I would say get the Tupilak for the simple fact that it is £70 cheaper for basically the same jacket.
FYI: The ME Lhotse is £300 and again would be fit for everything that you would be hoping to do.