Some pellet grills (typically earlier generation Traeger models) were much better suited to being a pellet smoker than a pellet grill, as they only had a 450 degree maximum temperature setting which is not ideal for good grilling/searing.

Modern Traeger models can go higher to 500 degrees, but that's still below the capabilities of a gas grill. However, there are many other pellet grills that can now get to 600 to 700 degrees, equal to that of a gas grill.

A higher typical price point compared to the average gas/charcoal grill has been a common con of pellet grills. However, our database currently contains 75 models under $500. So the common complaint of 'pellet grills are too expensive!' is not true in all cases anymore.

In general though a con (based on your perspective) that pellet grills/smokers produce less smoke than a charcoal smoker/offset smoker is true, in general. Pellet grills/smokes produce a lighter smoke flavor in foods. 

Now, there are pellet grills that come with a 'Smoke Box' which can add additional smoke flavor with smoldering wood chips, wood chunks, and charcoal. But generally speaking, yes, if you are looking for the most smoke flavor possible and you have the time to put up with managing a fire, a charcoal/offset smoker will provide more smoke flavor.