Benelli Nova. Superior to both in every respect.
How?
Ambi safety - nope - better spot than 870 not as good as 500.
Bolt release accessible - nope - same as 870 not as good as 500.
Rotating bolt - pretty cool, till you have to clear a jam, and if it's anything like AR or Garand - NO THANKS.
Mag cutoff - why? you can change ammo by loading straight into the mag instead*.
Superior complex ... not superior.
* One scenario where mag release is handy - you just loaded WRONG cartridge into the chamber, then you topped off your magazine with another WRONG cartridge: break grip with shooting hand - find action release, start racking - wait stop!, break grip with support hand, find mag cutoff ... now you have both hands off the darn gun, empty chamber and you are looking for the RIGHT shell ... seriously!!!!???? You loaded two wrong cartridges, have both hands not in shooting positions (don't tell me you just "ride" the mag cut off button - nothing will go wrong there LOL) and an empty chamber - now! that's what I call tactical superiority