I agree i have edited my post.
with A139 you have a wider part peeking out below the dotted area, with one of the other models that part is less wide, and it is symmetric with the lens in the middle, the asymmetry of the A139 draw attention to it,,,,, well at least for me personally it do.
Not in a big way but people who are super conscious about how a system will appear on the windscreen of their car should have this in consideration, while i do also weigh stealth high, then me testing and having many cameras on windscreen probably make it a little natural to not care as much for this as i otherwise say i do.
And i think if i could get a camera like the A139 in the traditional wedge design, i would probably weight it over the A139 if i was a regular guy shopping for 1 system ( factoring in the mounting options in my particular car )
I also thing for car with a sensor array on the windscreen, even if they also often have a dotted area flanking that, then the A139 design, sort of dictate what side of that array you must install it for the best result.
Not sure the lens part as it is, would then be a
+ as it could peek out to the side of the dotted area, cuz i think it will have to be much to the side to mot have dots in the field of view.