Looks to me like they’ve stepened the seat angle? Even if specs don’t say it?
Doesn’t quite work like that. When a frame has a curved or kinked seat tube, the ‘seat tube angle’ you see in the geo charts is a theoretical angle based upon a specific saddle height.
Draw a straight line on the Orange frame from the bb centre to the saddle centre. That’s the angle in the geo chart. Not the angle of the actual not of Orange tuning you can see with the seat post inserted into it.
Thus, on the Orange frame if your shorter than average, you get a steeper seat angle relative to the geo chart. Vice versa if you have giant long gangly legs.
On the new frame with a straight seat tube, the angle of the “actual” tube matches the “theoretical” seat tube angle, thus your relative height is immaterial.