Awning Size Coachman 575 VIP (2017)

Hi 

Are there any  2017 Coachman 575 VIP owners, with a Dorema  Daytona Awning size 15  or a Ventura Pacific A1025/G19.

I was wondering if there is any one with this arrangement I was wondering how the awnings fit or do i need the next size up.

 Has anyone got the next size up ie Dorema size 16 or a Venture Pacific A1050 and how well do they fit.

I know my awning size is 1038mm and it recommends a size 16 

Many Thanks