Having the two of them in the same team would instantly make that team incredibly fun to watch...for a neutral. Opposition teams would absolutely hate to face them because it is so incredibly difficult to defend against either of them, but they'd also know that despite the chaos that both could inflict, chances are that they'd just ruin the end product 98% of times.
If the two of them ever really turned it on in the same game though...utter devastation. The opposition would want to wave the white flag at halftime.