Those two are very different. The P238 is a 1911-style gun with a thumb safety. The TCP is DAO and without a thumb safety. In my opinion, they're hard to compare because they're very different types of guns. If you like shooting 1911s in single action, you probably won't like the TCP. And if you're used to shooting DAO pistols without safeties, something with a thumb safety will have to be trained with constantly to learn to use it.
I'm not saying one is any better than the other, or that you should choose one or the other. What full-size Sig are you after? I would recommend that you buy whatever type of gun you desire to have. If you're after a full-size 1911 from Sig, then the P238 will likely be a good match. If you're after a DA/SA pistol from Sig, then the TCP might be a better match.