The results are in

The experiment started with four steaks. Two steaks were prepared in a marinade and two with my traditional steak rub. The bag in the middle contains chicken strips since one our dinner guests does not eat red meat.

My Chargrill duo is pictured here. On the left you can see two steaks and chicken tenders on gas. The steaks on the right you can see the charcoal portion of the grill.

Finally, the steaks were removed from the grill. If you have a steak at our house, I hope you like it rare/medium rare! The different color tooth picks indicate (to me) where the steak was cooked and whether it was a marinade or rub.

My wife and brother-in-law were the only ones sampling. Wife correctly identified the place that three of the four were cooked (she guessed gas on three of them) and was able to correctly identify two of the four "flavors". Sister-in-law could taste no difference in chicken cooked on gas vs. charcoal.

The result, no real difference in gas vs. charcoal. Also, no real difference in marinade vs. rub.