Your basic premise doesn't account for wheels being a set item. Wheels really boil down to two categories, custom sets and factory builds. A custom wheel builder has a selection of rims, spokes and hubs to build with, to build a wheel suited to an individual rider. Alternatively, factory built wheels are designed and tested as an assembly. Comparing them is very difficult because the rims and hubs of many factory rims & hubs are not sold individually. If you want a Shimano C24 rim or straight-pull Dura-Ace hub, you're buying the whole wheelset. This means that many of the options you might like to check overlap or are mutually exclusive.