There is no simple answer to this question. Ultimately, it comes down to what you plan on doing with your bike. The 64-inch Can-Am Maverick X3 can go further and faster off-road than the 72-inch model, but it may not be suitable for most trails. If you primarily ride on dirt and trails, the extra width of the 72-inch Can-Am Maverick X3 might be a better choice for you.