What's the difference between 'although' & 'even though'??

For me, it would sound better without the "but":
although/even though John was exhausted, he still managed to win

about the difference between although/even though I can't say...

Both have a similar meaning, and you could use either in your sentence. They mean "in spite of the fact that".

I agree with the Guest that "but" should not be part of that sentence.

Miriam

But what if it's a MCQ whereby these 2 options are included, so which one is correct???

Both are correct, provided that the sentence loses the "but", which doesn't belong in it.

You ask which is correct, but neither are correct in the example you used ! Ditch the but.

Giver her a break and answer her question guys, she's obvioulsy a student of English.

Good answer here:

hi there, dear you can not use although/even though with but, say: although John was exhausted, he managed to win,you also used still in your sentence , how much conjuctions and subordinates etc, we can use one, although/even though, or still or but. try it yourself

Anonymoushi there, dear you can ...

Please realize that it is not appropriate to address strangers, such as members of a forum, as "dear". Save that for your family members and very close friends and in the formula for beginning letters.

I would say both are correct. Even though feels stronger. Implies to me that speaker/writer would really have expected Joh to lose. This sentences might be followed by a discussion of how exhausted he was or how he managed to overcome his exhaustion.
Although feels like a more neutral statement. This sentence might be followed by comments on what happened next , what resulted from his win,

both have the same meaning , but even though is more stronger