The question is in crytonightheavy, is where there is a big difference in both calculators, as well as that in one I put it as the best option xDD
there I lose myself : )
The difference is just their "suggested" coins computed based on the site's own formula.
It must be something to with: Difficulty, Block Time, Block Reward, Price in USD, Price Change(24h) and other parameters that they've considered, not just the Algorithm.
On Whattomine, you can also configure the list of exchanges where your final list will be based.
TL;DR: Both have different methods or "formula" on suggesting most profitable coins.