I once heard there is certain mentality that when given more options, more people end up making purchases where they otherwise would not. For instance, if you have one fast food chain along a short stretch of road, less people will go to that one location than if there were multiple, competing chains in the same area.

I believe this is called agglomeration[0][1], and may have parallels beyond physical, competing stores, into realms like similar, but differently named CPU's.

[0]http://journals.sagepub.com/doi/abs/10.1177/0042098017694131 [1]https://en.wikipedia.org/wiki/Economies_of_agglomeration

edit: rplst8 mentions binning, and that seems like another likely factor as well.