RB951Ui-2HnD or RB751U-2HND ??

Hello,

the router RB951Ui-2HnD and RB751U-2HND have the same price in my distributor.

What should I buy?
What is the best?

Regards.

RB951 is newer and more powerful, it also has more features (i means power injector, you can power another router via ethernet)