I just borrowed an MT-09 for the day while the 07 for in for some warranty work. I covered 120/130 miles all county roads and I had a blast!
Would I buy one..YES
Is it better than the MT-07..YES...
Is it more fun than an MT-07..NO...both bikes are brilliant with max fun from either
It is more comfortable than the MT-07..NO..right hand went numb, has this supermoto kind of seating position - I did love it.
Is the seat better..YES...more grip, thicker and softer.
Are the brakes better..YES, much better..they are Awesome.
Is the suspension better..Hell YES....much better over the bumps. Did feel a little flighty when pushing hard.
Fuel consumption..NO but not by much..I got 53mpg(UK) on a bike that was just days on and only 50miles on the clock.
A good commuter bike..YES but no better than the MT-07..it has wide bars but it makes no difference to filtering.
Better Handling..YES, I personally felt this was the biggest leap for me, i could throw the bike into corners much easier than the 07.
Power..YES..bit obvious really....she pulls much harder than the little sister, particularly when you hit higher revs.
Fuelling..MT-09 has 3 modes.. gives you a soft throttle response ideal for wet weather riding[STD] is your everyday mode that the bike reverts to when you switch it off [A] gives you a Sensitive throttle , this was fab on more spirited riding with no play in the throttle. [A] mode has it's place and is fun just not for everyday riding as I found when I tried to navigate a gravel infested country road which required more delicate throttling, it just wasn't possible in [A] mode. Not better or worse than the 07 just different with options.
If I only had room for one bike or the money for one bike the MT-09 would be it...
After riding the 09 all day the 07 felt positively small in comparison.