As far as I can see, Lamptey is faster, and a better crosser of the ball than Chilwell. He's a better defender than AWB, and he's a lot more mature than Maguire*.
God knows why Chelsea sold him.
*Admittedly not a high bar...
It was funny watching James at the weekend (vs West Brom). I don't think he tried to beat his man once all game. Kept taking the easy option of passing inside. Pity we let him score that wonder goal against us.