Hi Jamie,
Good idea for a collection! I grew up near Detroit, so I've collected a lot of Tiger players. The T207 set was issued in 1912. It contains a few Tiger players who are not in T206: Bauman, Covington, Drake, Gainor, Lively and Works. Those guys are likely to be on your spring training rosters once you've located them.
The T206 set was based on players from 1908-09. So quite a few players were different on the rosters by 1911-1912. I've enjoyed collecting T206's and T207's.
Here's an article I found about the 1914 Tigers Spring Training in Mississippi:
http://nighttraintodetroit.com/2014/...100-years-ago/