I think the s-max is wider. That based on travelling in one. I’ve tried googling and the numbers seem to support this. Looks lik maybe 10 cm
file:///C:/Users/John/Downloads/touran-gp-ii-brochure.pdf
http://www2.fordconnection.com/fordconnection/multimedia/gbr_en/006/yyb/gbr_en006yybidimspc.htm
Width has a huge effect on volume
I know this from a surfer dude
He said buy the 7′ 6″ board I said what about the 7′ 4″ board
He said. “You’re looking at the ends so you can’t see much difference”. But the extra length is the middle. Imagine a piece of foam 2 inches long in the middle of the board acroos the full width. You need the volume of that foam to support you when your learning to surf.”
Great stuff from a youth who thus far in the conversation hadn’t shown much spark