Hello,there. i'd like to try to answer your question. In my opinion, if we come across a situation concerned with the ability, actually we can use both 会 and 可以, for example: I can swim. 我会游泳 or 我可以游泳, but 我会游泳 sounds more naturally; but if we come across the situation concerned with the permission,, we should use 可以. for example: Am i allowed to smoke here? 我可以在这里吸烟吗？People never say: 我会在这里吸烟吗？ Hope my explaination helps you a little bit :)

会 - capable, accordance to your knowledge 可以 - ability, physically able to do

会=I can，可以=OK!

会 And 可以 be a big difference! Take the "What would you do?" And "What can you do?" Is that the former means that you have the ability to own: the latter on behalf of you under certain conditions of the permit, you can do the things you are willing to do so!

会 和 可以 差别是很大的! 就拿"你会做什么?"和"你可以做什么?"来说,前者表示你自己有那种能力:后者代表你在某种条件的允许下,你能做你愿意做的事情!