I feel the quattro version IV has a better shaped crown, lugs and case. But mark 1 is significantly thinner just under 9mm, 38mm...my wrist is barely 16cm.
More importantly...the dial for both the original versions of 1860 and 1863 were 18k gold, with engine turned guilloche, and the circular brushings of the silvered sector make the 18k gold dart shaped hour markers look like they're actually floating. The 3 D effect is amazing. Also I prefer the dauphine hands in the original version. They cut no corners here...Chopard were showing the world what they could do back then.
Rishikesan