I have a 12 gauge Winchester model 1300 and I purchased a "ProMag Magazine Tube Extension" for it some time ago.
I have shot at least 6-7 different brands/types of 12g shells through my gun and this extension works great every time.
Now several of my friends (who have different brands of 12g shotguns) have purchased the TacStar and really like this product. I have been with them at the range and have not seen any failure to feed issues at all.
Just from my observation... spend the extra couple of bucks and pick up the TacStar.
I hope this helps.