Assuming proper prep and enough time to maintain a show car shine, all three produce a high, deep gloss and my eyes just can't tell subtle variations in gloss. Others may have a more discerning eye but I just can't. All are easy to apply and remove. I haven't really had SN long enough to put it through it's paces except for a two day window, but what a two day window it was!
The Vic. Concours has great durability, holding it's shine and beading ability longer than Souveran by far. Not only by my experience but by another more clinical type test done in the UK (Detailing World). Vic. Concours has a strawberry smell and reminds me of times spent at the regattas at Henley, but that's another story.
Sometimes the wife, not a car nut at all, will look over the deck railing and comment that she's never seen the Red Racer looking better and for her to comment at all is a testament to the above 3 waxes. She'll offer the comments for all three, depending what's on that time so the shines are quite close.
Interestingly, she'll never comment on Sluggo2 (dark green), the winter driver, when it has a new coating of Collinite 845 or FK Pink Wax or Klasse SG or OptiSeal or Bilt Hamber's Auto Balm.
Price wise, Vic Concours < Souveran < SN and I keep all three close.
Maybe this spring, when the Arctic Char return to the sea and the cariboo return to the tundra I'll do a side by side comparison and see if I can really notice a difference.
-John C.