Hmmmm now we're playing with fire. Accumulator, you'd think that this would be an easy question. Concours, despite being relatively cheaper than the higher echelon of EGZymols, is very competitive in terms of depth. It can develop (like I said earlier) an extremely sharp and deep reflection that will rival the likes of Destiny, Atlantique and Vintaaaaaage (Vintage), with the right handling.
But since you've asked, I'd say that the deepest reflection would be a run-off between Atlantique, Vintaaaaaaaghe, and of course Royale, with Destiny hanging right in there. Aside from depth, the widest color range I'd have to give to Vintage and Royale. Vintage just takes the range equation to another level..........its result is quite a sight to behold.
There are a lot of doubters out there, and to some extent I can't blame them in some respects. How can anyone (except a diehard waxaholic) even consider the ridiculous rates that Zymol asks, yet really believe that their waxes would literally dominate the field in terms of finish performance alone? Yet the animation, color response, and eventual depth of shine I experienced from Vintaaaaaaghe was like none that I've yet to see in any wax or lsp.
The only thing that I can say (that I usually say) is to go beyond the doubting, and take one of the waxes to the test, and see whether it actually performs or not.