Could my buddies 2013 be so much faster than my 2011?

Hi Guys I have a 2011 850 xp with 700 kms on it and i just picked up a 2013 850 xp with 200 kms on it. Mine has 14 inch allow wheels with 27’s his has factory steel 14" with 26’s. Otherwise these are stock machines.
His feels way faster than mine and wheelies without me pulling back on the bars, mine wont even come close.
Other than the 7 hp why would his be so much faster?
When I first traded to an 850 from a 570 I was disappointed that the feel wasn’t huge.

p.s. I was paranoid about the timing gear issue but mine has no idle fluctuation and no other common symptoms

Thanks in advance:werd: