yeap the days of switching passports in the air, getting new passports with new name due to deed poll etc are all long gone now... Finger prints, facial recognition, international agreements on sharing dual nationality info etc.. They pretty much know who you are before you get on the plane... 🤣🤣
They are the same immigration wise however if you intend starting a business go with US passport due to Amity agreement, you can own 100% of business and not need the whole