No doubt , bwdo is better. Whether u talk about 6* or 5*. Her damage potential is exceptionally well and doesn't demand suicides mastery but gets alot better with suicides. Both champs aren't suicide friendly but bwdo's massive sp2 usually destroys the fight hence avoiding/taking recoil damage less times.
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BWDO relies a lot more on skill and timing (plus a decent ai) while pretty much anyone can pick up and play Elsa