Thanks for the very detailed post! I'm very new to the CGC Boards, but certainly not new to collecting comics (IG handle is my ID here, but quite new there too).
It does interest me though that you actually prefer the cents copies over the pence copies even though you're English! I'm neither English nor American so I'm somewhat ambivalent about either.
The key thing here to me is, as I understand it, literally almost everything is the same. Cover, content, same press, printed at the same time, same paper, same ink. At some point of time the pence was printed instead of cents, and the calendar month was removed so that long shipping time wouldn't make it seem like the comics were outdated. But it seems to me that they are one, and the same! Except for that price. I can't help but wonder if this is down to general collector education, or whether truly not many collectors want the pence variants despite knowing the history behind it? In modern age comics, there are plenty of collectors that clamor after cover variants (I personally don't).
There are certainly collectors out there who look for pence variants because variants in general appeal to them. I do seek out a few pence titles (the earlier ones i have are FF#1, #3, #5 etc). Another source of demand is also those who want to own key books but who can't afford / not willing to pay as much for the cents copies. The latter group however is probably getting smaller primarily because the pence variants are starting to get almost as expensive as the cents copies.