I have not yet ridden in a Venture car so I cannot comment on the seat comfort. But what I can say from the pictures at least is that the seats do not look all that different from train seats used on European railroads. In 2020 I rode on both RENFE (Spain) and TGV (France). Here are a couple pictures that are pretty similar to the seats the trains had.
TVG: https://www.seat61.com/images/lacroix-tgv-2nd-large.jpg
Renfe: https://www.seat61.com/images/Spain-ave-train-103-t2-large.jpg
Those look awful as well.