There’s no 1-to-1 comparison, you really just need to sit in a few and see what works. I find I’m a lot pickier about fit in my dressage saddle than I am for jumping. I tried several different jump saddles that I would have been happy buying but it took ages to find a dressage saddle I didn’t hate. YMMV. My saddles are the same seat size but different flap configurations (same brand); the seat in my dressage saddle is maybe a touch small but it’s still comfortable.
The Adelaide flaps run pretty short - their standard/2 is equivalent to a short flap in other brands. I’m just shy of 5’2 and their standard flaps are the correct length for me so you’ll probably want longer. How much longer, and whether you want forward or straighter, is going to depend on how your legs sit relative to the blocks and stirrup bars. The flap can also affect what seat size is most comfortable. You’ll probably want to go .5-1 inch bigger but it’s hard to tell without sitting in them. Luckily for you the Adelaides are super common used so you should be able to find what you need to try pretty easily.
