Coldcard Mk3 vs Mk4

Other than comparing the Mk3 and Mk4 on the official website, which I understand what the new features are. If you already had an existing Mk3, would be buy a spare Mk3 or Mk4 as a backup device? I see some people suggest Mk3 over the Mk4 but just want to find out why and what people think.

submitted by /u/brando2131
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