I personally prefer the griptilian, but I'll list some differences so you can decide.
GRIPTILIAN
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[*]weight-3.25 oz
[*]Blade Length-3.45"
[*]overall length-8.07"
[*]Axis lock
[*]non-assisted
[*]metal pocket clip, reversable
[/list]
BLACKOUT
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[*]weight-3.5 oz
[*]Blade Length-3.25"
[*]overall length-7.75"
[*]Rail Lock
[*]assisted
[*]metal pocket clip, non-reversable
[/list]
Additional comments:
-The griptilian has a hole for opening and the blackout has a reversable thumb stud (It can be moved with a philips screwdriver for left or right handed folks)
-serrated edge on the blackout is deeper
-the handle on the griptilian is secured at 5 points, the blackout is secured at 3 (Probably doesn't matter, both are near indestructable.
Hope this helps.