I started off my trip into knifedom with a spyderco.. ok.. it was a pseudo spyderco.. one of the first generation Natives that were assembled by Camillus. Good user knife, but I wasn't too impressed.
Then I got the BM Pika (tanto version) and there was slight bladeplay, not too impressed either. bladeplay was actually later eliminated with a Torx..
Then came a spydie D'Allara and a BM 10300 Monochrome.
The spydie was in one word... SMOOTH... smoothest folder I've had so far... but the BM's framelock locked up like a fixed blade.. ZERO bladeplay.. no S*** and we are talking about red class made in Taiwan BM performing like that!
F & F were comparable on both which led me to think that a blue or black class BM might outclass the spydie, but then I had a made in China byrd crossbill and boy was the lock up tight and the F & F excellent... in the <$25 region, the byrds can't be beat..
I have a 710 custom fitted with a M2 blade coming in a week or so, my first axis.. dying to get my hands on it, might not be a fair comparison to any spydie or BM since it has been changed in a way (for better or for worse, I wouldn't know), but well.. will see how it goes
So there.. I know I haven't said anything conclusive but just tot of sharing my own experience...
One last thing, if you look at the folders closed. BM definitely has sleeker lines and more pocket friendly size than spydies.... closed.. the BMs are way way cooler than spydies....