Parker is one of the worst possible comparison's for Banks - Tony drives under complete control and has an incredible arsenal of shots in the paint. Banks rushes at the rim on the verge of being out of control, worse than Barbs ever was. Still he does take it hard and draws fouls at a pretty good clip so it is the best part of his offensive game.
I do remember Eric insisting that Marcus Banks was a SG but I don't recall many people saying he was anything like a pass first PG. Pretty much everyone knew he liked to go hard to the basket and that he shot occasional 3's at a decent clip (35%). Statistically, that year he looked like a lot more of a PG than Barbs - 5.8 asst/40 vs. 3.9 for Leandro.
Sure, quite a few people were hoping that Banks would be Nash's successor while Eric insisted it would never happen but if you pick almost any young PG in the league, the odds of him being a worthy successor to Nash are very low. As people have remarked many times, if young Steve Nash was in the league right now, no one would be touting him as a likely heir to Steve Nash. So Eric might be proven wrong yet, but at the moment I tend to agree with him - Banks is no closer to a PG than Barbosa. Now, Leandro seems to be on a better learning, too.