Time Lords can sense each other in his universe, but he wasn't sure it was the same in the other man's universe. He had a feeling he was one and going by said Time Lord sense, he seems to be in the right. He just didn't want to completely assume since well...every universe is different. Hell on the last universe hopping trip he and his companions did, his counterpart was a singer like him, but he was still in his first incarnation.

"Yeah I do. I landed there in 1937 in an area called Texas with my son and then wife Jessi. We just escaped the Time War and I had my first regeneration not long after we landed. This is my second incarnation, I just like Earth enough to stay and have some kinda career, plus I liked the music that was playing around so I became a singer."