It shouldn't make too much of a difference if you take 3 caps twice or 2 caps "thrice". More frequent dosing allows for a slightly more stable serum concentration, but that really isn't going to help or hurt you either way. I would be more concerned with regards to whichever fits easiest around your schedule.
Rebound XT is pure ATD. A decent anti-estrogen, in my honest opinion. If you take too much, it can cause a side effect of low libido, which isn't actually a bad thing.
aPCT is a propietary blend of 6-bromo and a few other key ingredients. It works to increase activation of the LH receptor, as well as controlling estrogen. If you are looking at something that will get your test back to normal, as well as to increase your libido, look no further than this one, my friend. From my experience, this works very well for PCT.