I hear a Handplant discussion and my ears perk up, so apologies in advance for nerding out
I haven’t done an egg, and have a mediocre invert so take this as you will
With an invert, you don’t have to commit all your weight into the trick, at least in as gnarly of a way. Any egg worth salting, you definitely have to.
Think of an eggplant as a fly-out Indy air to snatching the coping as you dive bomb in (perfectly illustrated by Mr Russell above). Whereas an invert feels a lot closer to “home”. You don’t throw your weight as crazy. Almost like wafting an BS early grab, but using your arm as a pivot point.
There’s also like two main ways to get into an egg.
1. More modern - Full air out, plant the coping on the way in (Schroeder, anyone since 2000) don’t die
2. “Back in the day” - Plant earlier and really “kick” your weight up and inverted (Groholski, Grosso, Lance, etc) sometimes looks more masterful than the prior
3. I guess it goes back further - like roto-rooters and shit but that is wayy before my time
Fuck, I wanna go try this trick now