JarrodS had such an interesting post, that I wanted to compare a bit. Included this pic: Caly 3.5cf, Sage 3cf, Sage 2, ZT 0770cf
Note that
I don't have a Sage 1, but I did manage to scrounge four ANIB Sage 2's (I like
titanium scales) and these other models, which tells you something...
I guess I prefer the Sage 3's bolt-action lock to liner-locks for "security" in solid lockup...in general. Yes, the ZT is a liner-lock, but I generally prefer the frame-lock (Sage2) over most liner-locks, although I have nothing to support that purely personal opinion.
Generalized appearance? The Caly 3 in carbon-fiber, which has these beautiful sculpted squares in the design that just shimmer as you rock the grip back and forth...followed closely by ZT's very excellent carbon fiber and their distinctive blade design...
Ergonomics:
If I were a surgeon, I'd pick the Spydie Cali 3.5 (back-lock) in ZDP every time. The
long blade looks like a thin scalpel, and gives you a long pointed reach, a good SOLID grip with the
high-rise jimping on the blade top, which would PREVENT your hand from moving forward onto the blade.. Excellent design.
Hard use: If I wanted to cut fuzzy-sticks in the woods, perhaps the Sage 3 in c.f. It has by far the grippiest scales. The other three, including the titanium, have the same degree of "slippery."
For ease of carry, the slim Caly is supreme. Love that wire pocket-clip. Very secure.
Blade-steel? No contest...ZT 0770 with M390. The same ZT is also available (cheaper) in Elmax.
ZDP-189, Elmax about a tie depending on HT. (Ankerson loved the 0770/Elmax in his testing). (ZDP can be chippy if too hard.)
S30V coming in last, but STILL an excellent blade-steel; perhaps a compromise of edge-holding, toughness, etc.
...and YEAH! What happened to my Sage 2's in titanium that I love? The only
frame-lock of the bunch, which seems to be my generalized preference in folders...(read CRK influence) Matter of fact, all four of these folders are really top choice EDC's.
Best of luck in your choice.