In reply to BnB:
I have climbed about 60 pitches (mostly alpine rock, some ice/mixed and multi-pitch sport) with both of these ropes.
There is not that much difference when new, maybe Icelines handle a bit nicer. But as said before, Phoenix is much harder wearing.
Once Icelines get a bit furry and worn, they (in my experience) develop the most annoying tendency to twist and tangle. This has resulted in more then one epic clusterfsck on a stance. This has never happened to me when using Phoenixes that seem to feed with no tangling even from under the pile (block leading).
I have also climbed a bit with Tendon Master 7.8. Excellent on ice but like all super thin ropes a bit scary on sharp rock.
Basically, I'm getting another Phoenix set soon.
Post edited at 09:34