It's kind of amazing that there's such a big height difference between the two; despite they're both the same complication! And this is why I really like the 5140. The 5140 and 5236 are both "slowly moving perpetual calendars" meaning the hands or the discs move slowly and take hours to fully indicate the correct information. I would've expected the 5236, being a very new and modern movement, to be nearly instantaneous or instantaneous. ESPECIALLY with all that height increase!