Well yes there is a lot more data and studies on testosterone and the effects are known. Sarms are new. Sarms were created to be used for muscle wasting diseases but were made so they don't affect the prostate. Sarms are usually used by younger people that can't source steroids and or that are scared to inject themselves. Certain sarms are good and have uses, and some are trash. But overall testosterone is better yes and almost every sarm is suppressive so it lowers your test just like steroids do so test is needed when taking sarms otherwise you just screw yourself up or have to take a bunch of clomid to restart you test