For what its worth I have neither of these coaches. A friend of mine recently went from a 2017 Fleetwood Storm to a 2019 Fleetwood Discovery 44B. I did get to look it over quite well and was impressed with the quality it had.
The only issue they had were problems right off the getgo with the jack system. They questioned about some residual fluid by the floor near the jacks they suspected may be leaks. Of course the tech told them it was not a concern and seemed to not be an issue.
They have had no issues to date and seem to be happy with their choice. When they told me what they paid I thought that it was too much, but thats only my opinion so not really scientific.
Good luck, as I have heard good things about Newmars build quality but never have seen a Ventana inside yet.
2001 Beaver Contessa Naples 40
2012 Cadillac Srx
retired AirForce 1979-1992