Upgrading Phone UK

Hi just about to upgrade from iPhone 11 to a iPhone Pro Max in the new green.
Both models are unlocked and I was thinking of using the quick set up.
My question is do I leave my SIM card in the iPhone 11 has I do it or put it in the 13 Max…
or would it just be better to do a iCloud back up and restore from that…Thanks

You’re going to love the new phone.

I went from 11 to 12 last year. Did it in a restaurant with quick setup because I was visiting my daughter and wanted to give her the 11. Put SIM in new phone but not sure it matters. Took a good half hour but worked great.

Thanks andyupton could not wait for a reply and just did it. You are so right the Phone is lovely.