The question you SHOULD be asking is what "coin" is worth anything? What "coin" can I do anything at all with other than mine, hold or exchange for other "coins"?? From what I can tell they're all just hot air. There is nothing you can do with any of them. Now if you're mining for the sake of educating yourself on the hardware or technology involved in creating these bit so hot air then great. If you're seriously asking which is a better investment,  then you REALLY need to think about what your doing and why your spending your hard earned money on mining equipment. Seriously do you think any of these are going to be valuable, ever? Will you really be able to EVER do anything more than mine them, hold them or trade them for other coins? And if the answer you have is yes, then PLEASE explain to us why you think this way. What about any of these scrypt, scrypt-n, scrypt jane, scrypt your mom, whatever is useful or new or will DO anything??