5140 vs 3940 Dial Dimensions

[qwerty123]

Good afternoon,

I have been looking more and more at perpetual calendars Pateks, and I am considering going for either a 3940P or 5140P and I was wondering if a 3940 dial could be fitted to a 5140, considering the case dimensions are very similar.

I much prefer the dimensions and exhibition caseback of the 5140, however, I am not a fan at all of the font and font size used.

Thank you!