Weight distribution is a major issue in RV's. That's driven mostly by wheelbase. Too short and the rear axle is overloaded, front is underloaded and it won't track steadily on the road. The 26a has about 58% wheelbase to length, and the 27K about 56%. People used to say 52% or more was good, but there's more to it than that. Manufacturers set the wheelbase according to the floor plan they want. They can't have wheel wells where you'll trip over them. So often there's too much rear overhang to allow a rear queen bedroom. 26A has two slides back there, so more weight than if the bedroom was just back there as overhang. That means 58% wheelbase doesn't distribute weight properly.
You can't go by door jamb labels, product brochures, even the builder's weight sticker somewhere in a cabinet. WHY? The axle weights are Ford's max ratings. The "as built weight" is total vehicle with no idea how it's distributed front to rear. Solution? Go get it weighed. If it's Rear Heavy/Front Light, it won't track on the road like one with 40% or more of actual coach weight on the Front Axle.
Look at Outside Storage space. In this case 27K has much more than 26A. Probably the issue of three slides vs one. Slide mechanism uses space that could be storage without the slide.
If God's Your Co-Pilot Move Over, jd
2003 Jayco Escapade 31A on 2002 Ford E450 V10 4R100 218" WB