Okay, I'm going to tiptoe in and try to give comment. I couldn't see your first links, but could see the second lot of photos.
Firstly, to get the best opinions, you need to post again with pictures without the saddlecloth. To properly assess the fit of a saddle you need to try it without a cloth.
Can we please see the shots you have done (withers & from rear), plus a photo from the side so we can see it on the whole back?
Now, based only on what I see, I would suggest that .... oh drat it, now I've started a reply, I can't see the photos!... oh heck, from memory then.
It looked too wide on the third horse, too narrow on the second, and I think it looked like it was tipping forward on the first horse. Sorry - not what you want to hear, so I reiterate, please re-post without the saddlecloth.
How old is the saddle? Do you know when it was last re-flocked? How smooth is the underside? A photo of that may be useful as well.