I was wondering if I get the 22" would I get in trouble on any overseas flights in your experiences and would be forced to check it.
As noted already, will vary by airline and ( possibly) by what class ticket you have.
This question does not have a singular answer, such as 'what is 2+2'.
From the Travelpro website the dimensions for the "International' size are
Overall Dimensions (includes wheels and carry handles)::
H: 21.75 in. W: 15.75 in. D: 7.75 in.
Case Dimensions: H: 20 in. W: 15 in. D: 7.75 in.
The 22" dimensions are:
Overall (includes wheels and carry handles):
H: 23 in. W: 14.5 in. D:9 in.
Case Dimensions: H: 21 in. W: 14 in. D: 9 in.
I suspect the "22 inch" bag will run afoul of many European airlines limits. US carriers probably less likely a problem, but would not be surprised if you did run into an 'issue' with a gate agent.