If you can't decide about my two miners please be aware that Rogue Miner is a basic miner to learn how mining works. It's hard to make money with that as it requires powerful CPU and GPU on the computers used to mine and it is mainly meant for newbies that wanna learn without spending much money.
On the other side omega Miner is an advanced XMR miner. XMR is a currency that can be mined with CPU so most people go for it if they don't have powerful graphic cards. Of course, it is more expensive but it also comes with detailed mining tutorial for people that are not much familiar with it.
If you're gonna mine on computers that do not have a GPU, you should go for this last one, clearly