Is there a break out chart of all the Arcteryx acronyms and "code labels"?
Ive sort of figured that "SL" is the "super light" stuff for marc twight / bouchard type fast ascents.

As far as I can tell the Alpha stuff is mre heavy duty "expedition" where the "Beta" stuff appears to be more targeted to "alpine" climbers..

So my real Q is the differences between Gamma AR vest and the Gamma SV vest...

Tech Specs:

Material:

Polartex Power Shield, two way stretch 

Insulation:

None 

Hood:

No 

Pockets:

2 Front 

Waterproof:

Water-resistant 

Core Venting:

No 

Weight:

[Men's] 9oz (273g) 

Recommended Use:

Hiking, camping, running, alpine 

Manufacturer Warranty:

Lifetime