I honestly can't say at this point yet. it really should be only judged when we see Jolla's own software running on their own hardware.
To me the core UI is close enough so it really comes to the speed of UI that i think Jolla will win.

Somebody who plays around with multiple smartphones a year (at the moment i have Lumia 800, N9, iPhone 4S, GS3) the N9 speed is just not enough for me anymore.
Honestly i don't think i probably can't use Jolla's phone as my only phone, just like i couldn't N9.