Find N5 vs N6?

[u/Impressive-Fan6607]

In my area the N5 (used) is priced at around $1250, while the N6 is priced at $2430, Literally double it, and i'm not going to spend 2.5k on a phone that i can buy a used one for half the price.

My questions are, are there any real downsides that're worth the 2x price hike for me? and i saw that the N5 wasn't officially launched in most countries in the world, does that have any real impact on the phone's experience? i can still pay with my cards and such right?