Well, since most of us grown up with R´n´R, Rock, Punk and so on, i guess is not too difficult to find more appealing versions of some old Jazz, Folk or old R´n´B songs.
We may have heard in most cases the cover earlier than the original one,
or maybe never heard the original at all.
Personally i´d be more curious about comparing songs which were both, original and cover, quasi contemporary, or from not so extremely different musical genre.
What do you think?
BUT: I´ll spend a beer to anyone who comes with a better version of the original "Smokestack Lightning" by Howling´Wolf! ;)