Rosie, I have found that the RV ocen is really pretty good....IF you check temp with an oven thermometer, use good quality aluminum pans, and the most important, put a tile in it just on top of the metal
piece that is over the burner. That made the biggest difference in even heat distribution. For breads, I ALWAYS check internal temp with a digital thermometer.
Having said all that, the RV oven does make nice loaves of bread using the 8x4 inch foil pans.
The Breville bakes different.....I have still not found the optimum rack placement. The breads and rolls brown too early, so I have to lay a piece of foil over the top. I check that oven's temp with a thermometer too.
I know,this was probably way too much information for the "normal" person and their application.
Edited to add: the Breville does a really good job on cookies. It takes twice as long to bake cookies in the RV oven. 8 to 10 minutes in the Breville vs. close to 20 in the RV. This is for chocolate,chip or oatmeal cookies.