Do a search for opinions dude, its easier as peopl ewont repeat themselves and tis has been asked before.
My advice (and many people on here will say the same) is that you try both guns, and see which you like the feel of the best. Both are wholly different guns, open and closed bolt, with different cosmetics and wieghts.
Ask someone with each if you can have a go, most players are MORE than happy to show off their guns, all you gotta do is ask