910: better battery life, normal buttons, same weight, no touch screen, water proof and better resale value.
the 610 fails IMO, it doesnt really add anything to the line up.
its really about the 910/310xt vs the 210.
910: better battery life, normal buttons, same weight, no touch screen, water proof and better resale value.
the 610 fails IMO, it doesnt really add anything to the line up.
its really about the 910/310xt vs the 210.