Fantasy Sharks vs Football Guys (custom scoring cheat sheet)

Have any of you guys used these sites for draft cheat sheets after inputting custom scoring systems? If so which is better.
Fantasysharks is free, football guys has the draft dominator for like 4.99 that allows custom inputs.

I have one league with very odd scoring rules and I like using the custom scoring feature to generate value based rankings using this leagues scoring format.

As for these two sites,
Their player rankings have significant differences when comparing sheets of the same league scoring between the two sites...