Hey buddy, great question and you're in a very strong position to begin with
Honestly it all comes down to where you want to end up practicing
If it's UK that you want to work in as I do, then EU is your best bet, I am currently studying in Slovakia year 4 Dentistry (also from the UK)
However, if you want to go to the states, due to the nature of so many routes in, it really depends on budget and how many years of tuition you can afford
If you can afford the whole lot, then it's better to go there from the start
If not, then of course, do what you can abroad in EU, then go over and try to get placed into 1 of the uni courses after, but again, still very expensive (just fewer years) also you need to find out if the course is offering you a specialism at the end or if it allows you to practice as a general dentist
By the way if you need any help feel free to get in touch
My username is the same as my insta so you can message me here or there, but my inbox on this doesn't work which sucks
Anyway, happy to help 🙂