Two very different animals my friend but here is a little quick info to help you distinguish between the two. "Clen is a direct beta-agonist with an approx half-life of 24hrs, meaning it will give a strong fat burning effect - but will also lead to rapid downregulation of the receptors and a gradually diminishing effect over time. Research is suggesting that you may partially prevent downregulation by dosing every other day, but there is not sufficient data to be certain. EOD dosing with gradually increasing dosages would probably be the best if using for more than 2 weeks. Whereas Var is an anabolic steroid, not a fat burner, although it has been shown to lead to some nice lipolysis in research, probably due to increasing T3 reuptake. Any such effect is most likely transient." Hope this helps!