The more I think about your question, the more this comes into mind:
What do you mean by "just as good" ? At its most basic level, the unit is merely a vehicle to hold your meat in a semi-closed environment while heat is applied.
I believe that the terms good, just as good, better, etcetera are relative depending on your needs, and vary from person to person. Because of this, it is the particular skill of the cook along with the heat source (gas, electric, wood, briquettes) marinade, rub, sauce and whatever else that will address your idea of "good" to your satisfaction.
It boils down to what works for you. Consider price, time and effort required to smoke the butt, and stuff like that.
Once you get a clearer idea, your answer will be right there. Don't mean to come across as being too casual- you have a valid question. In an effort to sort out a decent answer for you, this is what comes up.
Hope it helps.