RB750UP or RB751U-2HnD: any difference?

Can anyone tell me about differences between these two devices?
I know RB751U has got embedded wireless card, but except this, which are real differences?
I would like to make 3G wireless router but boards looks have the same functions?
For example, let’s suppose I keep wireless card disabled, which one is cheaper in terms of power consumption?
Thanks.

RB750UP has poe-out and voltage/current/temperature monitor and this is all differences.
I think that the power consumption with wireless disabled will be the same.

RB750UP is also a lot smaller