That was one run and Bird only hit 23 threes in it (barely one a game). He only had one other 50/40 run and he only hit 7 threes in that. Most years he was closer to 46/28.
He only averaged 25ppg in his one 50/40/90 run.
His eFG% in that run was just 55%. And besides that year he only broke 50% once.
LeBron's gone 50/40 in a postseason THREE times, hitting 20, 35, and 44 threes in them.
LeBron averaged 29ppg, 27ppg, and 32ppg in his three 50/40 runs
His eFG% has surpassed 55% in SIX postseasons. He's hit 62% twice. He broke 50% ten different times.
So if 50/40 matters to you, then LeBron destroys Bird in that regard. More points, on better 2pt shooting. More threes, on better 3pt shooting. And he did it in a slower era with tougher defenses.
But Bird does have better free throw shooting.