Wirelessly posted (Mozilla/5.0 (iPhone; U; CPU iPhone OS 4_3_3 like Mac OS X; en-us) AppleWebKit/533.17.9 (KHTML, like Gecko) Version/5.0.2 Mobile/8J2 Safari/6533.18.5)
6630m would be better for both.
6630m is 480 shaders@485mhz
6490m is 160 shaders@750mhz
Ie the 6630m is theoretically significantly more powerful
No. The macbook pro has a faster CPU (quad core vs dual core in 6630m equipped mac mini). Most applications except for gaming does not take much advantage of a faster GPU.