I AM understanding your question.
Let's see, let me try again: raising testosterone by lowering test conversion to estrodiol won't really be significantly "noticed" by guys who have normal to high test levels. If your normal test levels are low, then raising it the amount aromatase inhibitors could MAY be noticeable.
Same thing with guys with high estrogen levels via the conversion. Controlling this with the inhibitors will definitely be noticeable, mostly in your mental demeanor though.
If an over the counter "test booster" claims you will gain a lot of muscle via the sole mechanism of inhibiting aromatase, and the individual does, then it is NOT due to ONLY whatever aromatase inhibition that supplement is doing. There is SOMETHING ELSE in that OTC supplement. Supplement companies do this quite often by the way...especially the ones playing around with anything remotely associated with hormones.