Wade's been less consistent than James mainly because he was hurt. Does everyone remember that period where Wade missed like 16 shots in a row over several games because of his hand injury? If both players had been healthy for whole season I think Wade would be the leader in both categories.
I thought Wade would lead the Heat in scoring coming into the season because I thought James' assist totals would keep his scoring down. I think over 82 games things will even out and Wade will lead the team in scoring and PER.