Let's get one thing straight. The Poo NEEDS a larger fuel tank.
All things being equal, a port injection engine will never match the power or efficiency of direct injection.
And for anyone who wants to argue this maybe the XP section would be more your thing.
Funny they added port injection on the 850 though. It only kicks in during mid and high rpm range, I don't know about you but I'm never in that range when riding off trail . Either way it will be interesting to see how this affects their fuel economy and until we get some side by side comparisons with the other sleds I guess we don't really know.