I’ve nothing to add, other than they both sound like ponces

Distinctly different to my ear.

The first is what I would call generic Oxbridge, though I would guess he grew up somewhere in London/the southeast.

The second has a couple of Oxbridge-esque lines near the beginning (‘you quickly notice’ etc), but mostly sounds like someone from the north of England (East Yorkshire maybe?) that’s lived in the southeast for a good few years and had the edges knocked off.