Can anyone tell me ?what the fragrance is I am trying to find a lime scented aftershave or cologne

This name is somewhat deceiving is somewhat deceiving because I thought it was going to be a lime or lemon Citrus but it is not. it has those notes in it but it also has an overpowering Cedar scent as well. Pass on it unless you want to smell like a closet

Does gent's gin smell like clubman vanilla or juniper/cedar with citrus notes?

It does not smell like Clubman Vanilla. It's very woodsy, and a bit citrusy but the woody notes are definitely the most prevalent. There's definitely cedar, and your description of juniper/cedar is much closer to what you'll get, again: more heavily on the cedar and less on the juniper. It's got that Clubman sting that you either love or hate: I happen to love it. But if you've used their products before you know what you're getting into.

Which one is the best for summer ? The gin reserve or the citrus musk ? Which one smells the best ?

I have not tried the Citrus Musk, for the simple reason I don't like musky aftershave, but for my money the Gent's Gin is one of the nicest aftershaves they make it has a crisp clean fragrance and moderate persistence.