Those ‘eggs’ would make good hockey pucks.
The McMuffin eggs are poached in a round frame/mold, so they are the right shape. I've never been crazy about them.
The biscuit and McGriddle eggs are omelet style, cooked in a rectangular frame and folded in thirds. They end up the wrong shape for a hockey puck. They are just regular eggs, nothing special, but hard to screw up, even for the teenagers working there.