Could someone please explain to me

what makes this http://vignette1.wikia.nocookie.net/leagueoflegends/images/2/2b/Kalista_RVideo.ogv/revision/latest?cb=20150225140758

so much harder than this? http://vignette2.wikia.nocookie.net/leagueoflegends/images/9/96/Malphite_RVideo.ogv/revision/latest?cb=20130805185249

Because I don't see how people balls this up so often.