As good as the Workhorse chassis were, they are getting pretty long in the tooth. The difference in availability of Ford parts vs WH will only widen. Although Workhorse still exists in name, they are not the same company, now only making some electric vehicles. This can make a difference if you need some brand specific part while on the road.
Do some research on the Jayco motorhomes. One of their units in the 29' range received a lot of negative comments due to stability issues when on the road. In the same line, the 32' model seemed to be ok. Also, just do some general research regarding shorter wheelbase motorhomes being less stable, but it really varies by manufacturer.
2012 Newmar Bay Star 3302 Blue Ox Avail BrakeBuddy Advantage 2015 Malibu
"Get busy living, or get busy dying." Andy Dufresne, The Shawshank Redemption
All other things being equal, choose the floor plan you like. I believe the relative quality between these 2 manufacturers is the same. Are you planning in going on the road? If which determine which had s the best service network. My guess on that would be the Winnie.