Hello Bro

To tell you the truth, I am not exactly sure what you need from us.... because the type of information you need require a thorough research to ensure the credibility and accuracy of the information... you can’t just go with whoever tells you whatever ... right???s

Another thing, is this for school or university? Because that would make a difference in the style of the research too

Anyways, you did mention the main points of comparison:
Accent
Style(s) of clothes
Traditions (which I guess you mean social behaviours)i


I would probably add
Main dishes/cuisine
Physique (i mean the appearances of people... or is that irrelevant???)i

Hmmm... What else


You know, i would suggest focusing on the unobvious aspects... like social behaviour... i am sure there are a lot of differences which would be very interesting to note them out
In addition of course to the other aspects because they are equally informative