I would have to say the class c has the better ride, less top heavy feel etc, which may be more beneficial to the motion sickness. My son rides in a car seat buckled in the dinnette seat, fwd facing. This requires the table to be down, so my daughter has to ride on the sofa. She buckles up, but most of the time loosens the belt enough where she can ride fwd facing, feet up on the sofa. She's hasn't complained so far. I guess I need to ride back there, as I was always the one to get car sick when I was that age.
John and Rebecca Dickson
Emma-7 / Little John-5 / Iva-1
Full Timing Again, Rev B
2013 Ford F-350 Lariat CC LB PSD
2015 SOB TT - With OC's Awning Poles (#8)
At least in Heaven, RVs will be perfect, and I won't have to keep fixing them.