Welcome to the group.
Just be advised that the S40 is a slightly larger bike that the other two that you are looking at (it is a 650 rather than a 250). I bought an 09 S40 for my first bike, and it was quite the learning experience. I sat on it before I saw the TU250 and fell in love. I didn’t seriously consider any other bike afterward, but I do like the looks of the TU250.
Also, it troubles some people (I think it is amusing), but the S40 is well known for backfiring.