OK, did some searching on the net and this is what I have found. Apparently AAKG has a higher bio-availability than L-Arginine so again I will make an assumption in that less is needed for the same benefit:
Aside from being an effective NO supplement, the key benefits of Arginine Alpha Ketoglutarate (AAKG) also include increased muscular pump and heightened energy levels. Used in conjunction with an exercise program, AAKG may support myodilation, the expansion of muscle tissue. AAKG is a more bio-available form of Arginine (or L-arginine) which is a crystalline free-form amino acid involved in numerous areas of body processes, including muscle metabolism, ammonia detoxification, hormone secretion and the immune system. Arginine supports protein synthesis as it is involved in the transport and storage of nitrogen and is important for proper physical performance because it is used by the body to produce creatine.
The typically recommended dose for AAKG varies between 2-5 grams per day, depending upon individual needs. For bodybuilders and performance athletes one half level tablespoon will supply approximately 3969 milligrams, or just about 4 grams for the bulk density of this AAKG powder. You can see the full bulk density/volumetric conversion chart for AAKG here. Taking 1/2 level tablespoon 3 times per day will supply a total daily dose of 12 grams. For individuals wanting to supplement with AAKG for their general cardiac and cardiovascular health should consider one level 1/2 teaspoon of approximately 1323 milligrams taken two or three times per day for a total daily dose of between 2 and 4 grams per day. AAKG is not recommended for continuous, high-level use for more than 80 days. Don’t take products that contain ephedrine while using AAKG as they may act as a vasoconstrictor reducing AAKG effects.
AAKG is used in the following Proprietary Formulas
NOW AAKG, 1Fast400 Arginine Alpha Ketoglutarate, Oxegen AKG Nitric Oxide Stimulator, Nitrostack Nitric Oxide, BSN NO-Xplode, Gaspari Nutrition SuperPump250, USPlabs Jack3d, Gaspari Nutrition SizeOn, MuscleTech NaNO Vapor, Creabolan 3rd Generation from Syn-Tec
L-Arginine HCl is used in the following Proprietary Formulas
Sargenor, Spedifen®, BSN NO-Xplode, Gaspari Nutrition SuperPump250, USPlabs Jack3d, Gaspari Nutrition SizeOn, MuscleTech NaNO Vapor, 4Ever Fit L-Arginine, AllMax Nutrition Arginine, Cheap Supplements Arginine, Higher Power AAKG Powder,Jarrow Formulas Arginine 1000, Natrol L-Arginine, NOW AAKG Powder, Shocker Nutrition N.O. Extreme, Syntrax Nitrous, Twinlab L-Arginine, Ultimate Nutrition Arginine Power
I found this info here.. http://purebulk.com/l-arginine-a-ketoglutarate-aakg