I guess I should clarify that we don't use the cooktops that come in some of the rigs. We only use the outdoor kitchen for the fridge in our current unit. I cook exclusively on a Blackstone griddle that sits on a table next to the kitchen.
The Chapparal also has a pull out grill that sits at a pretty manageable height. We also like that the outside TV is in that same unit instead of having to drag one out from inside. We also like that the outdoor kitchen is set to the back of the rig and not under the awning.
The Cougar 368MBI only has a pull out grill but it's directly centered under the awning, which takes away from covered sitting space if we were using it.
The Heritage Glen only has a refrigerator, which is workable but the gas line is also centered under the awning.
We are really liking the layout of the Chapparal but I have never owned a Coachmen and really don't know how well they are built in comparison to a Keystone product.