If you are meaning which suppressor is going to be the most "repeatable" in terms of little to (dare I say it) "no" POI shift between taking the can off/putting it back on, then a lot of factors are going to come into play. To make this conversation shorter I will toss in what I believe to be the most important to repeatability and that would be total indicated run out (how concentric they are, in layman's terms) will produce LESS (I didn't say none) POI shift, however, nothing is guaranteed. I have seen exceptional "repeatability," as I believe you are describing it, from companies like Thunderbeast and Abel Company.