I'm just so confused and can not make up my mind!

[Tobus]

The gentleman on the right is wearing a kilt jacket (sporran cut-away), the gentleman on the left is not. He is wearing a Saxon jacket. The ones on the right are sold as day wear and I have one my self.

Regards

Chas

While it does appear that the jacket on the right has more of a cutaway than the one on the left, I wouldn't go so far as to say that the one on the left is a 'Saxon' jacket. It's not long enough for that. It is a little on the long side compared to the other jacket in the photo, and appears to come below the fell line of the kilt, but it doesn't appear to be longer than the sleeves. Saxon style jackets would be longer than this, with the usual rule of thumb being that they should cover the buttocks, and they fall well below the sleeve length. So that jacket on the left is, in my mind, still (barely) within acceptable limits of length for a kilt jacket and would be way too short to be a standard Saxon jacket.

On cutaways, not all kilt jackets have the rounded cutaway at the bottom. I've been noticing this lately. As you can see in the image below, jackets with a straight line (no rounded cutaway) have a long history in Highland dress, and they are usually made where they angle back at the sides. The jacket on the left in the OP's photo seems to follow this style of having straight panels that angle away from the bottom of the lapel to the bottom corner, which creates a nice gap for the sporran. If this were a Saxon jacket, you would expect to see the front panels being much closer in the middle, since they are meant to be worn buttoned.

And while it is true that most modern jacket tailors will put a rounded cutaway at the bottom, it is not an absolute rule that a rounded cutaway is required for it to be a kilt jacket. There are some tailors who still make straight front panels (angling away from each other as they go down) with more of a corner at the bottom. I actually like the look, because it reminds me of this: