It's a bit of a tricky one HS.
I'm sure that, for curries that include "crunchy" onions, capsicums, chillies, etc (e.g. bhoona, jalfrezi), it is best to present them immediately after cooking (i.e. to preserve the "crunchiness" of those particular ingredients).
However, having said that, I frequently freeze these types of curries and I am perfectly happy with them subsequently (i.e. after defrosting and microwaving them...after which, those ingredients have lost most of, if not all of, their "crunch").
I suppose it is all down to how discerning your guests are?
But I agree that a happy medium is to put the first one in the oven, for as short a time as possible, whilst making the second one. Then serve both immediately.
However, if they aren't particularly discerning, put them both (the curries, not your guests!

) in the oven to warm whilst your guests get inebriated!

Thereafter, they will probably be far less discerning anyway!

Not sure that helps much, but I hope so!
