For me is not about the brand, is about the particular model that may or may not suit a certain task better.
If a brand happens to have knives that appeal to my needs the most, so be it.
For example I use the Spyderco Rescue for any outing that involves ropework (climbing), if I am going to be near salt water (boats or beach), I might take a Pacific Salt fully serrated instead. For office carry I preffer a Centofante III or a MiniGrip (as it is the case now). For outdoor carry the BM Crooked River suits me better.
I have more knives from Spyderco just because they are, generally, cheaper. But I guess both brands make great knives.
Mikel