The whole "nano" thing is almost certainly a marketing gimmick. You should ignore it and just make a decision based on the hard specifications given. So the main difference seems to be that the NaNO one has a much higher discharge rating (65C vs 25C). But both those numbers are far more than you would ever need for a max discharge rate of 2A.
For your application, buying from a RC hobbyist store doesn't make sense. RC batteries will be geared more towards very high discharge rate and low weight, rather than long lifetime or low cost.