I have a Citori White Lightning in 16 ga. and another with matching dimensions in .410. They are good solid hard working guns. Not exactly elegant, but very serviceable. They are good value for the money as O/U's are priced nowadays.
Whether you shoot a Brownng or Beretta well depends almost entirely on which fits you best. I love Berettas but cannot shoot them with standard stock dimensions, they are too high in the comb for me. Suggest you go to a local club and try both if you can before buying. If not, at least swing them both in a store. Then decide.