There is a misconception is that triples and doubles are better than the other. Neither is an indication of quality, it's more of a difference in purpose. It's like asking which is better... a truck or a sports car? Well, the answer would depend upon what you need a vehicle for.
Someone who races and looks for every split-second advantage would have different needs than someone whose primary goal is for recreation and to save their knees.
In a nutshell...
Triple advantage = wider gear range
Compact double advantage = quicker shifting, lighter weight
That said, there is good–better–best" within the triples, and within the doubles. The quality within that range is what you pay for. An "upgrade" is to go from 105s to Dura-Ace. To go from a triple to a double (or vice versa) is simply a change of gearing.
