Differences can happen when players drop from games and aren't recorded to the end of the match results. There's your offset reason.
Otherwise, we're sampling from
Total number of kills: 52,187
1 : Visitor
975 : Knight
6,964 : Champion
4,468 : Mage
1,673 : Cleric
22,034 : Raider
9,117 : Scout
6,499 : Bourgeois
456 : Artisan
Total number of deaths: 47,807
19 : Visitor
1,316 : Knight
9,173 : Champion
4,712 : Mage
6,434 : Cleric
15,837 : Raider
5,960 : Scout
3,713 : Bourgeois
643 : Artisan