My 5 cc's...
To clarify, Laxogenin is usually derived from diosogenin though found naturally occurring in smilax sieboldi and Tribulus. There are several 25-R compounds all loosely related to Laxogenin. Turkesterone is something entirely different, derived from the source genus Ajuga Turkistanica.
Generally speaking..
Laxogenin: Anti-inflammatory and protein synthetic response
Turkesterone: They'll tell you it's the absolute best Ecdysterone for protein synthesis. In fact, it's real forte' is building red blood cells.
Rhaponticum Carthamoides Extract: IMO, the best overall plant to derive Ecdysterone's benefits in humans.
Important to point out that RCE contains many, many individual Ecdysterones (there were 487 identified, as of last count). Source =
http://ecdybase.org/. RCE has the best of these in groupings of 10-12, variously referred to as "the levseins complex" in former Soviet literature.
Knowing which ones to use, when and with what other nutraceuticals is the real nuance of Ecdysterone supplementation. It's not as simple as just adding 500mg/day of ecdysterones and eating big/winging it in the weight room. They're adaptogens, not anabolics. An important distinction never made when introduced in the West. If you look at my formulas, you'll see each uses ingredients that leverage Ecdy's glucose disposal (way overlooked), protein synthesis and cellular fueling effects.
As for Fadogia, never ran labs on it. It does seem to be one of the more promising test boosters, certainly more than DAA or what have you. But let's be honest: Even a 50% increase in low-normal test levels isn't going to make a lick of difference. The man training on 600ng/dl of endogenous test isn't likely to experience much gain vs. the guy at 300ng/dl. Get him up over 1,000ng/dl though and things start happening.
Unfortunately, that's going to take aggressive HRT or a trip to the black market to get done. Still, are supraphysiogical levels of test/free test necessary for great gains? Nope, not IMO. You'd be much better served harnessing the power of insulin via your diet. A great read in this area is Dr. Mauro DiPasquale's Anabolic Diet.
Doesn't come in a bottle, does get results...