Two very unusual methods there.
What would you say each of these achieve over a more traditional preparation method? I assume you've both neglected to mention that you remove the 'marinade' before cooking, or do you keep it on there?
Having thought about your method, it sort of makes sense once I remember that you're not using an entire stock cube per steak!It's just stock and oil (in my case, anyway). Leave it on there, just no need to put oil in the pan.
Doesn't make much difference, just an overall enhancement in flavour IMO.