ITP Blackwater Evo

Does anyone know if the 27" blackwater evo will work on the 2015 outlander 800 xt without modification or should I stick with the 26"?

Also, would you recommend these tire over the mud lite XTR for general use?

So far I have heard nothing but good for both tires, just wanting to get an idea of what everyone thinks.

Thank you in advance for your help and suggestions!