American-English spellings vs. English-English spellings.

Which is likely to be a higher scoring game of scrabble? Obviously, you get an extra point with all those "U"s we put in intriguing places (favoUrite etc) but with the Yanks using "Z"s instead of "S"s (analyZe par example) that's an extra 9 points RIGHT THERE.

Perhaps there are stronger lines of argument on this subject but nonetheless, this is the one I'm going with so what other words are there where Britain wins.

Also, feel free to just express random opinions on the subject.