I've been riding a MASH on London's streets for 6 months.
No problems with comfort. Incredibly smooth.
Personal preference, but I wouldn't run carbon frame on the roads.
I know someone who ran over a pot hole an bent his frame.
Dolan's are fugly too. (IGO)
it's base on observation really, no fact at all just my opinion, I'm basing those on what i've read (other peoples opinions) so for all know is that the ride charastic could be similar or more comfortable, of for all I know it couldn't, or for all we both know we could both be wrong, as both of our opinions are based on others peoples opinions, which are based on other peoples opinions which might possibly (or not) be based on fact.I hope you have found this advice helpful.
And this is exactly why you should take internet opinions with a pinch of salt ;)
And this is exactly why you should take internet opinions with a pinch of salt ;)