If you don’t need him to score, A is better as a distributor. The big speed advantage covers for the small disadvantages in athleticism and defense at the pg position, and if you’re at the start of the season, by the end of the year, A will be mostly or all caught up in those categories anyway if he starts. He’ll also have bigger advantages in speed and ballhandling. Plus he might have some of that coveted “slasher” ability with a little more LP work, as a good FT shooter. This one isn’t too close, if you’re at the start of the season, IMO.
This is only a tough call, IMO, if you’re at the end of the season, and you need some scoring out of this position. B might be a just *slightly* more efficient scorer right now. He won’t shoot 3s very well, but can still hit some outside jumpers better than A. But that’s so close I wouldn’t really sweat it. A’s speed is still more of an asset than anything B brings to the table.