There aren't many benchmarks available or the 7730m, but the ones that there are show it does better than the 7670m. Also note that the 7730m is GCN, whereas the 7670m is VLIW5 (GCN is much newer).
The Samsung notebook has other benefits, such as 2 USB 3 ports (instead of 1, total of 4, instead of 3), more RAM (negligible real world benefits). The other specs are nearly the same, relatively bad screens, but that's expected at this price point (unfortunately). It's also lighter (thought not much).
It depends on how badly you want a new computer, but I'd wait for the 7730m.