Should i go with the american education system or the british education system? (more details below)

I plan to study in the US and the school im going to offers both systems. british education as in O/A Levels and american education system as in the SAT and AP too probably etc…

Either one can work. If you might want to study at a university outside of the US, and if you use the US system rather than A levels, then you’ll want to take at least five AP Classes and AP exams or SAT II subject tests. These will be considered equivalent to A levels by unis outside the US, and will allow you entry. So don’t guess whether this school offers AP classes - you need to find that out.

The advantage to the British system is that it’s more focused during your A level years. You only take the subjects you’ll be doing A levels in. The advantage to the US system is that it’s broader. You’ll get to take classes outside those areas of focus. So which one you do is up to you - which do you think suits you better? Either one will work, again, so long as you go the AP route in the US system.

I think the US system is the best considering that you might apply to colleges/ univerisities in the U.S. as well. Some U.S. colleges dont except courses from England inclusing Aice classes and only accept AP, IB, Dual enrollment courses( depends on the actual school).
Buy taking these course you can get college credit, and it cna look reallt good on your college resume as well.
Many international kids applying to u.s colleges do not have the opportunity to learn in the U.S. or take American courses which can make them beter on what colleges want .

What @Bervely7 is saying, is that while many colleges and universities do award some college credit and/or advanced placement for specific A level results, some don’t. But it also is true that every place sets its own policies about awarding college credit and/or advanced placement for AP, IB, and CLEP scores, and for dual-enrollment classes. If you want to maximize the amount of credit you can be awarded so as to get through college faster, then you do need to plan your studies carefully, and you need to look for colleges and universities here that will award the largest number of credits that are useful for your degree program.

British system classes will not keep you out of any college or university in the US. All of them are familiar with the British system to be able to interpret your school records. If there is the likelihood of studying anywhere other than the US, the British system could be the better choice.

If there is the chance that you will move to the US before completing your secondary school education, then the US system will make it easier to integrate when you get here. But again, high schools here are used to receiving international students and can evaluate your record and place you accordingly. If you would arrive during what would be your last year of secondary school, the British Council can help you find a school where you can complete any pending coursework and take your A level exams.

What is your status? Are you a US citizen living abroad, or will you be an international applicant?