Mark is a direct and terse narrative of a specific segment of Jesus's life and teachings while the republic is an attempt to expound a philosophy and system of government.

I agree with you, but I'm not sure I'd call him a more ambiguous writer, mark is a 'just the facts, ma'am' notation of verbal histories near contemporary, with the other gospels being attempts to add on contemporary allegories and legends attributed by different groups to Jesus (or John who just did his own thing).

I'd be curious at the comparison of the apology and crito, similar narratives of a similar figure in a specific segment of his life (the end of it). It's fairly direct and terse as Socrates was portrayed as being direct and terse, but otherwise the styles are similar as (throw on hard hat) Jesus appears to have been attributed many of the allegories of Socrates in the recorded gospels, which makes sense if you're trying to appeal to followers of hellenic religions such as those in Rome and Greece.