Either tube set is fine. I have both brands for skeet (Kolar in a Remington 3200 and Brilley in a Perazzi MX3). Personally I like Kolar but they are both superb tubes and you can't go wrong with either brand.
From my experience and your last post, tubing for hunting will make a barrel heavy gun. In my skeet guns, which are heavier that a 20g SxS, I actually added about 6oz of weight inside the stock to balance the gun better. Makes a heavier gun but it balances well.
Lastly, for whatever reason, in both sets of tubes I have, the 28g tubes throw the best pattern and consistently have the best smashes. If I hadn't to shoot 1 gauge, 28g would be it.
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