I don't feel you can do a verses to be honest. If the saddle fits the horse, the rider and the horse goes well in it, it matters not what it is.
The treed will give you sweat patches, more of a concern is if these are not symmetrical or an area that's dry when the opposite side is not.
If you are using a non panel treeless then your weight is distributed over the whole saddle, its possible had you used say the HM or Solution Smart, you may have got similar patches as they are panel base.
My cob hated the Solution because that model took me away from her, she is in tune to bodyweight and feel. The panel restricted us. So although I use a treeless, its only because that works for us, if it didn't I would change saddles.