Champagne/Wine tastes are unique to the person. I have had Dom, Crystal, La Grande Dame, and all of the other high end champagnes. It's all about what you like, not how much it costs. I know this because I taste wines almost daily in my job.
I personally think Dom is horrible. It sucks the moisture from your mouth leaving me wanting a glass of water to sooth the "cotton mouth".
Crystal is not as dry, but I was not impressed enough to ever think about buying a bottle.
What you need to know about Champagne is how dry (or sweet) you like it. The scale, from driest to sweetest is: Extra Brut, Brut, Extra-Dry, Sec, Demi-Sec and Doux.
BTW. The Big Pimpin' Rap artists are buying up all of the Dom Rose. Driving the price upwards of $235 WHOLESALE cost.