Yeah, some counter-intuitive stuff, considering they are all from the same brand. Sizing can be odd, so I don’t know how one model compares to the other in all these cases, but the ranges I grabbed seem close.
The whole thing gets even more strange when you start looking across brands. I have been shopping gravel bikes and comparing to my Trek Boone. The WB is one in the running (once they fix the new fork recall) and others.
There are some very wide ranges on some dims and angles between them. I think some is the relatively young history of “gravel” bike since these mostly started from CX and touring bikes. I expect some variations and testing that will eventually end up with some “standard” numbers that will settle in for the most part.
Here is my personal chart looking at 56 size models from a bunch. Some large differences in here: