Whta has to be compared? A FRN handled folder to another? Than BM offers the old Ascent (Pika now?) or the Griptilians.
The knifes with higher standard features are mostly BMs and from Spyderco you actually find the Manix, the Paramillie. Other G10 knifes are without steel liners. Maybe the Liltemperance comes into play.
Any Axis knife is lefty friendly.
Just the Manix is lefty friendly.
The Ascent wasn´t but even the Pika is right for lefties.
If Spyderco is so great, why do the ignore lefties? They do for the .2$ of spared screw holes.
Fit and finish on BMs are better. For the money they take a bit more time to finish the knifes.
Spydercos look more like "no mans hand was on it" (

).
My request for broken tips found Spydercos, no BMs (that doen´s mean BMs wont break the tips, but in real life it doesn´t seem to happen).
Maybe some of the lighter models are the better cutters. But looking on the actual high priced models without the cheap hollow ground, the edges ae as thick as BMs.
I sometimes see it as a prejudge about BMs edge thickness based on the ATS34 time.
My opinion is based on the models BM 550, 520, 140HS, 806 and Spyderco ATR, Paramillie.
For the companies i think both have their niche. Sal is more the front man, keeping contact with the knife knuts. But as i was searching for the AFCK i found ppl. like Bob Kaspar saying, that the Benchmade ppl. are loved in the industry, cause they are nice ppl.
BM is represented by a few more ppl. Angie is in front of warr. The forum is managed by ,uh forgotten the name, the #5000 was promoted buy Steve Ingram. Les is in the second line, from our view, he came last year to declare the oversea production. I like that company that is not focused on one person, because every sucsess they made is based on every mens and womens work.
I will always buy a BM but always keep an eye on Spyderco products.