Yes, CDL a styling thing, a version of the rifle with a somewhat understated walnut stock in a satin finish. CDL stands for "Classic Deluxe," they say. I suppose the fact that it comes after ADL and BDL, which Remington has used for model designations for years, is the real reason for the name.
It might vary model to model, but the Model Seven CDL has a light-colored walnut stock with a darker, contrasting fore-end. A moderate pistol grip. It has fairly decent checkering. The stock is straight and has no cheekpiece, if I remember correctly. Has a magazine floorplate you can open and a rubber butt pad. Mechanically it is just the same as any other Model Seven.