The TS1 and TS2 magazines are interchangeable.What is the difference between the two TS 1/2 magazines? Google says the more expensive one is the product code for the 10/26 mag, but your site doesn't indicate if it's the 26 rounder.
Both the ones listed there say they are "Tactical Sport 1/2" magazines though. Are you saying the one that's $146.99 is the TS1 mag?The TS1 and TS2 magazines are interchangeable.
However, the TS1 magazine is pinned to 10 round, and the TS2 magazine is two pieces.
The TS1 magazine is smoother for reloading but more expensive in general.