Flat out, no matter how well built a knife is, if an individual due to their own personal preferences, cannot "happily" carry said knife, it's not worth the price, no matter what the price...
Bias fanboys from either side, (any side), will hail their favorite brands almost religiously over any other, be it Benchmade, Spyderco, Nike, or DeMarini, and other other brands will pale in comparison...
Personally, somebody could give me a pm2 for free (best price ever), and I would simply pay it forward and gift it again to someone who would/could appreciate it, because I can't stand the way they look, and after handling them, I wasn't awed or impressed to the point of "wow, I have to own this knife". I wouldn't/couldn't happily carry a Spyderco (most models), because to me, and my own personal preferences, they are an eyesore, and I would much rather carry a different quality built knife that I could more thoroughly enjoy every time I carried it because I liked the design... That said, I do like Benchmade designs much more, they are more pleasing to me, and thus, Benchmade is the better value, even if the price is similar. I won't buy knives, shoes, guns, shirts, trucks or cars, anything, that I don't like to look at.
Fact is they are both quality built knives using premium materials, at a mid to upper tier production prices, both have good qc and good warranty's, both have some lemons squeek through, and it really all boils down to which one an individual prefers...
From an unbiased stand I'd say the two are equals...
From a personal preference stand: Benchmade > Spyderco