Welcome to the Community @betcha
An interesting point. Also see
and especially (previously linked)
The issue for lab testing is to minimise and standardise the variables. Consider the difficulty in assessing each pod machine trying each of the scores of pods available, and than fairly ranking them against each other with POD-Machine A Using Pod AA produced better coffee than POD-machine B Using Pod BB. Would many be able to assess one against the other? Would it be applicable if the pod was changed (different flavour/variety or from the manufacturer)?
On balance I think you just asked for the pod used to be revealed, but would that help those who preferred and purchased other pods to become a curious and probably limiting element of the review? I would punt most consumers prioritise the pod rather than match a machine and a pod and never move on.
Comments?