Tbh, I'm not sure if that comparison with the Kop is using the original Meis design which was for 60k+ and therefore larger than what we have. It is also shown as a full single tier. So this is not really a true representation.
However, it does illustrate a couple of things. Firstly, the difference between "looking bigger" and actually being bigger. The Kop is a much shallower single tier, but has 76 rows at its deepest, compared to 60 (or 63)rows at our South Stand. Of course our stand makes up for less rows by filling the corners to complete an upper bowl, but there isn't that much difference in capacity.
Secondly, and relating more to some of the posts about atmosphere...... if you overlay both actual stand cross sections, you can also clearly see the contrast in how the fans relate to the roofs in both stands. If you draw a line from the roofs leading edge at 45° down to the seated tier, then count the number of rows back to the rear of the stand, you have some indication of the acoustic-catchment of the stand, ie the number of rows that get the acoustic benefit from that roof. At the Kop, the roof is much closer to the fans, and it is angled slightly down.... giving it a much larger acoustic catchment than at BMD. I haven't done the same exercise for the new Anfield Rd stand, but that has 83 rows over 2 tiers, and is much steeper than the Kop, so is probably a better comparison to our South stand in terms of both height and acoustics.