Yup that’s exactly how you do it. I had similar not over 7 seats but the difference between a 60 enyaq and the 85 like seats, adaptive cruise etc. If you can genuinely justify it they generally seem to listen most of the time.
Especially if they give you a list of cars and you can show why none are any good and why then show them what will work and why. Sometimes being neuro divergent is a asset, lol.