Depending on which of those calculations are correct, the ones that would suit me best would be either the 50T combined with an 18T sprocket or a 54t with a 20t sprocket. Neither of which would have the ultimate top end, but both would give me a slightly easier pedal up my horrendous hill.
So I'm not really sure if offers me enough to consider the switch. Although I would concede that my most used gears are 4/5 and then probably 3. But I often find myself thinking 4 is too low and 5 is too tall, so I could probably find myself with a better choice.
I almost bought a 12-speed P-line a few months back and was then pleased I didn't when I heard about the G-Line being confirmed.
Looking at the stats above I think the 12-speed would suit me better. Especially as it looks like I'd be in the middle ring more often, and therefore it would be more efficient.
Kind of confused now. It could be that a G-line would replace both my current Brompton and my 25 year old MTB - if I can get a test ride of the medium and it suits me. But realistically, the 12-speed is lighter and more suited to my current commute.
Definitely going to hold off until the modders get involved and look at it again in the future.