alt Hacker NewsNew Glenn's engines are quite a bit less efficient than those at SpaceX. Lower chamber pressures, lower thrust:weight ratio, and they're partial flow staged combustion.
I assume BO will increase their performance over time, but for now they company is about a decade behind SpaceX.
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damnitbuilds • today at 10:25 AM
Spacex's work is out there ( and I am grateful for the excitement that generates ) but BO work in the shadows, surprising us sometimes with major advances.
I suspect BO not as far behind as you think.
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That doesn't make the BE-4 not impressive. It isn't a full flow staged combustion engine like Raptor, but it's still a highly efficient, high thrust, relightable and deeply throttleable rocket engine. These things don't often come in the same package when it comes to rocket engines.