While they both suck push bang blow thats basically where it starts and finishes.
And it doesn’t go any further so far as the effect of mixture control is concerned. Varying the fuel/air ratio of what’s sucked into a cylinder that’s fitted to a radial engine has the same effect as varying the fuel/air ratio of what’s sucked into a cylinder that’s fitted to a horizontally opposed engine.
Or maybe the laws of chemistry and physics mean the fuel/air being sucked into a cylinder fitted to a radial engine combusts differently than if it’s being sucked into a cylinder fitted to a horizontally opposed engine. Maybe the compression is squashier or the spark sparkier? Hmmmm....But what happens when the aircraft to which the radial engine is fitted goes into a vertical climb or dive and the engine effectively becomes horizontally opposed? Does the fuel/air being sucked into the pistons ‘know’ to behave differently? Remarkable technology.
Walk us unedgumicated through it, Rod.