In reply to JayPee630:
They may look quite similar, but in feel + construction they're a whole world apart. We'll be releasing the full series of trade show reports over the next week or so, so keep an eye out for our interview with them for a more in depth analysis. We'll also be publishing a Sneak Peak article in the next month, as one has just arrived for testing.
In terms of the Mutant I'm inclined to agree, but also disagree. For those super-light alpine days out 22L will ordinarily suffice, especially if you're doing distinctly un-British things such as carrying your rope/crampons on the outside of the pack and already wearing your harness + other bits. For those kind of days 30L is overkill, in fact 30L is a kind of strange size in many ways - particularly from a climbers perspective - as it's too small for a lot of trad + Scottish Winter days out and too big to be fast/light.
I may regret sticking my neck out when I look back through some photos and see countless pictures of myself using a 30L pack, but I always have had a bit of a short memory!