Can you elaborate please ?
M-Test and Optimize-T are both great natural testosterone boosters.
KSM-66 is one of the best and most well researched natural testosterone boosting ingredients on the market but some people don't like it bc they say it makes them tired; which can normally be alleviated by splitting the dosage morning and night anyway. It doesn't make me tired at all, it just makes me feel more relaxed and not want to slap stupid people as much
But that's why we didn't use KSM-66 in Optimize-T, so that it would be an option for people that don't like KSM-66.
And overall, different things work different for different people so when comparing M-Test and Optimize-T, one may work better for one person and the other for the next. Both are great products, its just finding which one you like the best.
For me, I have an endocrinological condition and I've been on M-Test for a very long time bc it helps my free testosterone levels in a big way so I didn't stop taking it to use Optimize-T but stack Optimize-T with it and can definitely tell an improvement in libido and also sleep quality.