I own both. I have size large hands and I found the TS wood grips to be both too large and slippery. I switched to thin aluminum grips and the size is now very good. For my hand the shape is not ideal as the edges are a bit squared of but overall very good. My 226 is the enhanced elite version which has smaller grips. A little too small for my hands but I bought it as a gun for my daughter to shoot. Grips size is not a problem and even though it is a little small it doesn't really seem to affect my ability to shoot the gun.
Just remember the TS and Sig 226 are very different types of gun. The TS is a pure target/competition gun. It has a very light trigger (dangerously light under the wrong conditions) and is more fussy about ammo due to the tight tolerance. The Ts is also heavy. The 226 is a combat style gun, much heavier trigger pull especially in double action. It will work with pretty much anything you throw at it feeds, goes bang and ejects EVERY SINGLE TIME. Much lighter.
I have thousands of rounds through both of mine and they are both excellent. The finish on the Sig is more durable that the TS. The coating on the TS marks relatively easily. Both guns are keepers though.