Often bikes were or are still matched with fsa cranks and tektro brakes to drastically cut costs. One bike would be specd with 105 then they would have tektro brakes and an fsa crankset. I found that an fsa crankset would be just as good function wise as an Ultegra or dura ace crankset and the tektro rim brakes to work just as well as Shimano rim brakes.

It’s only the weight penalty really that is the negative and everyone that isn’t a professional tour rider really need not to be worried about the weight of components on your bike FYI.