They look like the delux in your pic, albeit a bit tired looking.My thoughts are to keep as much of the original parts and re condition them, hence a re-trim. The delux are nice I had them in a previous S3, they are a bit softer too.
It’s only vinyl so I could simply wash them down. The diamond pattern took me the longest to stitch. I suppose they took a few hours a night for a week. All you do to stitch patterns or lines in them is use 6mm scrim foam and stitch through both. I also made a plywood cubby box and covered that.Wow, that is amazing. Nice colour too. I have watched lots of videos and they make it look easy.
I guess I have nothing to loose with the old seats they are in good shape just a couple of rips.
Did you use leather or vinyl?
How many hours would you say you put into it?