Orion should win a good majority. Durabilitywise, Nova Prime is prolly a tad below. Also you can't bfr Orion. He'll just tube it back and smack Nova on the noggin.
He's a warrior brick, strong and tough enough to take on Superman and survive disintegration attempts from a global matter manipulator.
He also has the Astro Force, manifesting as either energy attacks or force fields, which ranges from barely being able to phase Superman and not even bothering Doomsday, to nearly taking him out with only a small burst of it so he's not accidentally killed, to shaking the Earth just by being fired at another target on the moon, to it's highest showing of being the only thing in the universe that could stop a universe ending doomsday device.
Simonson also established he has some amount of super speed, and he has his motherbox.
Well, it's a universal force. At it's best. it's the yin to the Omega Effects yang. Every bit as devastating as anything the most powerful Galactus heralds can output.