This has been discussed countless times @Infowarrior with most every flagship launches.
USA gets one version and we get another and then the various YouTube reviews hit testing one variant against another which usually from what I've seen has little difference.
Some users believe one is better at power management over another to name one critique.
It's down to what works well in a particular country i.e features and network etc and parts they use in different countries I believe.
I've known people to import a Samsung phone because there convinced it's better than the variant available in their own country and that's up to them.
Choice is upto the owner.
Current Phone ~
Samsung Note 20 Ultra 5G SM-9820 _ Samsung One Ui 2.5/ Android 10. Snapdragon 865+