The reason you are getting conflicting advice is because of your 10" duct.
Your builder recommends the Wolf line because the 1200 CFM and 1500 CFM blowers connect to 10" duct. However, this will be noisier than the Vent-A-Hood when connected to 10" duct. Therefore; your salesperson, who appears to have been listening to you, is aware of the noise factor in your situation and recommends a 900 CFM hood. Vent-A-Hoods are very quiet but 900 CFM is not enough to ventilate a range with a griddle and a grill.
They'll both perform okay, but you may not like the noise from the Wolf and probably won't like the power of the Vent-A-Hood.
Your situation requires adequate ventilation and quietness. A different Vent-A-Hood, with a 1200 CFM rating instead of 900, would do both, but you will need to change out to a 12 inch duct. The size of the duct is a determining factor in overall noise of a hood. Larger is always quieter and the extra 2 inches decreases noise by about 30%.
Your builder does not want to redo this and the salesperson is selling to what is already there.
There could be an X factor. The Vent-A-Hood, although you won't have to clean it often, requires you to reach up into the shell and detached the box around the motors for cleaning. Not knowing your health or what you look like I don't know if this is practical or not. Your builder may know this and recommends the Wolf for that reason. But, your 6-3 husband can certainly do this task then.
IMO, when comparing these two lines, go with a 1200 CFM Vent-A-Hood, utilizing 12 inch duct.
Q