Hand rakings calculated w/ non-PokerStove formulas

I've been playing around w/ a few equity tools (besides PokerStove) like Holdem Viewer, Equilab, and Slice, and I've noticed they have options to choose different methods of how hands are ranked. There is 2-way equity (heads up), 3-way equity, 4-way equity (PokerStove's formula) which I guess are are self explanatory enough. But then there are other options like Bloch, Takana, Sklansky-Malmuth, Sklansky-Chubukov, NoFoldem, & a few others.

As a novice full ring cash player who is mostly trying figure out how to put a villain a range when I see their VPIP in the HUD, I'm wondering whether I need to pay much attention to these different ways of calculating hand rankings. I've been primarily using PokerStove for hand analysis (which apparently is based on 4-way action). Should I just stick to that and assume it is more or less reflective of the way people will play their opening hands?

(p.s. I know who David Sklansky and Mason Malmuth are. I just don't know if their different models are worth trying to understand at this point.)