It's worth noting that part of the point is showing that the difference can be very small. The one at https://www.osar.fr/notes/justintonation/#compare https:/

It's worth noting that part of the point is showing that the difference can be very small. The one at https://www.osar.fr/notes/justintonation/#compare https://www.osar.fr/notes/justintonation/#compare is really tiny, the largest difference being 3hz, you can kind of compare side to side using https://www.szynalski.com/tone-generator/ https://www.szynalski.com/tone-generator/ and see for yourself. The difference is more perceptible below that, in the chord comparisons.