User blog comment:UsoppThePotato/Warwick on mid lane?/@comment-5556439-20130626000500/@comment-2094543-20130627070558

AD bruiser Warwick is insanely vulnerable to crowd control because his heal is sustained, while AP Warwick can outheal a huge chunk of damage with a single Q. Both are situational, and depending on teamcomps/counterpicks, AP Warwick is sometimes better.