Here's a side by side photo of the two restored clocks. The first one (on the left) being older, dates from around 1840-50, it is 10" wide x 16" tall. The second one is from around 1870 or so, and it measures 11" x 19".
As a small side note, I think the back panel on the older clock is a replacement. I have seen a few other early comtoise clocks with flat doors that also have a flat back panel. I believe this clock originally had a flat back panel as well, and that it was lost or damaged at some point.