Well .. . there is quite a difference in standard Tahoe and ( New +2017) Acadia dimensions. The Tahoe is 10" longer and 6" wider. While a very nice SUV, too it leaves much less space to get around it in my new 2 car garage. Wife would have difficulty parking it no matter where.Tahoe just as easy to drive as an Acadia. Very comfortable seats, great on road trips. My son's fits in his garage just fine.
Just choices. .. . works for some . .. . for others the Acadia is just fine. Acadia is already bigger than the 2015 Equinox we recently sold.
Chevrolet Tahoe: - - 204″ L x 81″ W x 74″ H
GMC Acadia : - - - - 194″ L x 75″ W x 66″ H