briggs& stratton 842921 and 492932 interchangeable?

Same thread size (3/4-16) and the gaskets line up. They appear to be interchangeable. I have some 842921's sitting around which I'll eventually use on my Cub Cadet with a Kohler KT725 engine. They give you the added benefit of a silicone anti-drainback valve. The 492932 has a nitrile rubber ADBV. Other than that, they appear extremely similar.
 
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