A Different Flails/Impeller Dry Down Question

So you've got your flail/impeller mower conditioner set to max conditioning, tooling through the hay.

Next day or the next after that, it rains.

How similar is a flail/impeller mower conditioner to a macerator?

I ask his because....

I've read that one of the problems with a macerator type conditioner with heavy dew or rain is because they strip the wax from the stem as well as beat the heck out of it too! I've read that hay quality, as the wax is removed and "openness" of the macerated hay stem - vs a crimped/crushed stem via a roller, will allow the hay to re-hydrate/soak up the water. I gather this is not such a problem for roller machines as the wax is still in place, and while stem moisture can get out via the cracks in the stem, the waxy layer that remains helps shield the hay from becoming a sponge - yet allow it to be dry.

How similar is a flail/impeller mower condition to a macerator and is subsequent rain after mowing a concern vs rollers? Any time/hay quality penalty with a flail/impeller machine after a rain vs a roller?

FWIW - one thing I especially like about the JD impeller mower conditioners is how they throw the grass towards the center of the flails. I should think this centered/concentrated mass of hay would really get scrubbed up as it passes through the impellers.

Rain and flail impellers - any dry down/hay quality issues?

A Different Flails/Impeller Dry Down Question