The MSI has more raw power, but I wouldn't really recommend hackintoshes for anyone...
Either get the MSI and run windows/linux/whatever on it, or just get the macbook and get it over with.
Also remember that the MSI isn't exactly mobile. 17" and 7lbs compared to 13" and 4.5lbs? Come on.
The MSI is a gaming laptop, no need for one if you wont game on it - it will just be very hot. I had a 17" gaming laptop once - not exactly something I'd call mobile.. Couldn't even sit with it on my bed - would have burned a hole in my legs, the bed and the floor.....
However, with that said - the few times I brought it to my friends houses for some good old LAN-parties, everything was forgiven...I loved it....