We looked at the Jayco Saturday and spent around 45 mins in it with the kids. DW says she can't find anything wrong with it.....:h
As with most Jaycos (IMO) the quality difference is felt when you walk in. The back wall of the Sierra flexes with my hand, not the same construction as the side walls. More belly storage with the Jayco and I like the hard rubberized floor in the compartment. The Jayco has a true gel coat finish, not sure what type the Sierra is.
However, like you said, with the Jayco I lose the outside kitchen basically. No source of water on the door side. I wear my outside sink out when we're camping, mostly just washing my hands. I do ALL of our cooking outside.
If we trade it'll be for the Jayco though for sure.
It's my understanding that the Sierra and the Sandpiper are the exact same unit. Someone feel free to correct me. I think they're OK and I haven't read a ton of negative on them. We just prefer the Eagle.
2018 Ram 3500 DRW CCLB Aisin 4.10 4x4
2018 Jayco Talon 413T
B&W Companion