How to reuse forms?

I have two types of "listings". A create and and an edit page for each. Each form is slightly different. Before I had

CreateOrEditListing

CreateOrEditListing

which handled create/update for both types but I feel like these components quickly get incredibly complicated with a LOT of ugly

if

if

statements.

Any ideas on how to deal with this?

How to reuse forms? - Filament