Finned/Studded Tubes

Definitively.

The fins/stud height are limited by manufacturing process. You cannot extrude a very high and narrow fin. Also, it would not be very efficient as there would not be enough material to conduct the heat to the end of the fins. The exact ratio depends on many factors but is basically inverse to the airflow.

The fin/stud spacing affects the pressure drop. The tighter the fins spacing, the harder the fan fan will have to work to obtain the desired airflow.

The fin/stud thickness relate to the heat transport capacity to the dissipation surface. Thick fins are usually used in high air flow with large temperature differences. Thin and long fins are used in natural convection or when the delta T is low.

The material used is also very important. Copper has almost twice the heat carrying capacity of aluminum but is more expensive and harder to extrude.

Finally, in low airflow situation, the color of the heatsink affects the thermal radiation which might be an important factor.