You can get as dark a bark as desired. The rub that you use has a lot to do with the bark color. More sugars will give a darker bark. As far as smoke you will not get as heavy a smoke than you can get with some other methods but I and many people feel pellet smokers give just the right amount. Too much smoke is worse than not enough. I've had stick burners and a couple WSM. I love pellet smokers for the ease of use and consistent product they produce. I like that I can put on a brisket at 11pm and go to bed and not worry about it. Just my opinion though.
Micro stickburner Rec-Tec pellet smoker, Yoder YS1500 and Stumps Stretch on order, 14" Original 1880 WSM, and Ridiculously Fast Red Thermapen. Past cookers: FEC100, FEC120, Klose stick burner, 22.5 WSM, Traeger BBQ125, Traeger Lil Tex.