I prefer single look, but used to chuckle about fake add on stuff whether scoops or more exhaust tips than exhaust pipes., etc..
BUT I may be forced to change my position since I decided on some kind of active exhaust. At least unless I can find a decent bolt on adjustable exhaust with a single tip. Maybe there is room for a down pipe instead of a second tip, but suspect that would have a negative effect on the sound. Too lazy for a DIY trial and error quest.