Lastly, I would go in and look at all of them, but I'm willing to bet you leave with the Nikon.
Going in and looking at them in a store will prove very little.The differences in a lit store will be marginal at best.The only way to see the differences in optical quality is at first or last light,with no artificial lighting.The best thing to do in most cases,is to go at dusk,on an evening when the store is open late,and have a clerk accompany you outside to compare scopes.