First off Y'all know I am a new found convert to Spyderco folders. Specifically the Military, PM2 (Para Military 2), and the Para 3.
The PM2 fits MY hands like a well broken in glove. It is my Favorite folder of all time for several reasons.
1. It just FITS.
2. I like the FFG grind as it makes a great slicer and is also more than strong enough.
3. The Spyder Hole blade opener. It works VERY well and it also does not stick out from the blade so as to impede the ability of the blade to cut to it's full depth.
4. They are not like any other knife out there. Oh others may have the Spyder hole in the blade but that distinctive hump makes it truly Spyderco, like the Talon Hole makes a knife a Busse.
Now You also know I am a fan of Emersons.
1. They are just plain old tough looking
2. It's not just looks, they ARE tough.
3. They're not fancy but functional blades that just work.
4. They just put off a Vibe that says "I will not fail you".
5. That Wave feature makes them the fastest deploying blades from your pocket.
I do still like them but for the present Spyderco are my favorite carry blades. I might start putting one in my Maxped bag for a backup backup backup

That fast deploying wave feature can become habit forming and can make you miss the ease of opening.
Spyderco or Emerson. You can't go wrong with either one. It's just personal preference, what you become used to.