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 Yoder YS1500, Stumps Stretch, Primo Oval XL, gasser and Ridiculously Fast Red Thermapen. Past cookers: FEC100, FEC120, Klose stick burner, 22.5 WSM, Traeger BBQ125, Traeger Lil Tex, Rec-Tec pellet smoker, Cookshack Smokette electric smoker.