He flew a Mark IX, comparing it to a Mk.I/II, for starters. Different engine, modified aircraft shape to start with and that particular aircraft has been further modified still, before it gained the Irish Air Corps paint scheme. It's not a fair comparison.
I'm afraid I read those "comparisons" as light hearted entertainment, as none of the ones I've seen have been particularly good comparisons. Another one is the F-R (not even the A2A) Cub floatplane and a real one... He complains about the water handling. That's because FSX water operations are completely wrong! It was silly even testing that, IMO.Edit:
Darryl was posting at the same time as me and in much more detail.