Name Order?

My husband and I want to use our grandfather’s names as middle names, if we have a boy. We originally thought his grandpa was named Christopher, turns out it’s actually Christian (there’s a lot of confusion, his actual name is Chamkaur but it was changed when he emigrated 🤦🏻‍♀️). We had settled on an order when we thought it was Christoper, but now we aren’t so sure? Which sounds better?!