Flown both and much prefer the dual cue. I find it more accurate. But I know other guys who much prefer the single cue "V-bar". To each his own.

I've noticed it's more common to have it be selectable in glass cockpit corporate aircraft whereas airlines assign the mode you'll use (example, CommutAir uses the V-bar in their Dashes, but other operators use the dual cue, and it's non-selectable by the pilots).

I don't know that I've ever thought of bank being an issue with dual cue...I just roll until it lines up and hold it. No different than a V-bar.