I know little about Piper Malibu's, so can't offer much on that topic. The big Continentals and Lycomings are pretty well equal to each other, other than to say that I am aware recently Continental has been consolidating the maintenance instructions for some elements of the engines, which could have the effect that overhaul shops can only replace whole, rather than repair some sub assemblies (stater adapters, for example). That will not reduce the cost to own and maintain.
While I respect BPF's comments about what to fly, I suggest before buying a 210, or Cessna twin, you familiarize yourself with recent Cessna service instructions and AD's. There are some pretty burdensome maintenance requirements, and although the C 210 N and P210 are not yet included, they could be captured in the future. At least be aware!
Last edited by Pilot DAR; 5th October 2020 at 11:46.
Reason: typo