Wonder what’s more profitable now? Is there like a hardware comparison chart?
I have not seen a comparison chart, and I dont think there is a general way to be sure.
Protoshares are more expensive, but they have more miners.
Personally, what I would do is spend a day mining primecoins, and another day mining protoshares, and then see which one would get you more money in that amount of time.
EDIT: Protoshares hardware comparison: https://bitsharestalk.org/index.php?topic=564.0
Why not mine both and see what you get more of in a 24 hour period in USD$$?
here is some super simple software to do just that.