More advanced as in dealing with different types of attacks like roundhouse kicks or dealing with multiple attackers which can be taught early but your best off getting the basics down first. Also stuff like gun attacks and knife disarms. Early level has defences for knife attack but no disarms the early knife work is get distance on them then get out of there. More advanced will be disarming techniques I assume
So fair to say the basics lessons are aimed at defence against a brawler type attack(which is undoubtedly much more common anyway), while advanced moves into how to cope against a more skilled opponent?