I guess if you’re looking at mining as a long term investment than perhaps it can generate you more coins in the long run but it’s also much more risky. First of all miners can break down, and even if you host them somewhere accidents do happens. Also there’s no way to know how high or low will the Bitcoin mining difficulty reach so numbers can change drastically. If you want an immediate winner than I’d definitely go with buying Bitcoins instead of mining them. Keep in mind that this post was mainly theoretical and there’s a lot of hassle and unexpected events I didn’t take into account (shipping delays mainly), but it should give you an idea about what to take into account before jumping into Bitcoin mining.