I assume you're looking at them both in stainless synthetic?
The lite is, well, lite - it has a sporter barrel, whereas the varmint has the heavier varmint barrel. The super varmint has an adjustable cheek piece on the stock, a larger bolt knob and a built in picatinny rail - other than that, not a lot - same action, same stock.
As to which is better, it will be down to your personal preference - if you haven't handled them, you won't know. Don't be tempted to buy a rifle you haven't handled at least a version of.