Between the two, I'll take Peter Green. Both Clapton and Green are blessed with marvelous melodic gifts and both are great when on their game, but....
Both guys run hot and cold, both had big-time drug problems.
Check out Fleetwood Mac's "Man of The World". A friend of mine who has toured profesionally playing rhythm guitar for The Cult for 2 decades put it nicely:
If that playing doesn't reduce you to tears, you have no heart.
Marty