I love these heads, and I can't imagine ever changing to another one having experimented with most of the available options. Considered by many to be the industry standard, Remo's Coated Ambassador batter drumheads provide you with an exceptional balance of attack, tone, and sustain - all for an amazing low price Coated Ambassador drumheads are made from a single layer of 10-mil Mylar that's been treated to have a warmer attack, which complements its open resonance. Basically, the Remo coated ambassador is the brightest sounding one of them. If you are a hard hitter, and don't want a darker snare sound, go for the Remo CS coated head- it is basically one of these with a black spot stuck underneath which stops the stretching and more than doubled the life I got from a head when I was in my 'rock' phase, with only a marginal difference if feel. By the time loads of the coating has chipped off it is time to change the head anyway because it has started to stretch slightly in the middle. However, what I realised is that I don't mind the chipping because I much prefer the brighter remo sound. The Evans ones last longer, and the Aquarian coated heads are bulletproof- they last for ever. The Remo one has powder coating which starts to chip off almost immediately, and could be annoying. The Evans sounds darker and the Aquarian one darker still.
Basically, the Remo coated ambassador is the brightest sounding one of them. They are all good- just choose the one which is best for your ears. This means more sustain and responsiveness than most 2-ply heads, while allowing for a little more focus and control compared to single-ply heads. At 10.5mil thick, the Vintage Ambassador is one of the thinnest 2-ply drumheads available.
People will tell you which is 'best' out of Remo, Evans or Aquarian, but don't believe any of them. The Remo Ambassador Vintage is a 2-ply drumhead, made with one 7.5mil and one 3mil ply, plus a top coating.