Cheers for the insight

. If find American English a little (and only a little - the differences really are quite marginal in the scheme of things, but that's the discussion we're having

) over-simplified m'self (Honour/honor, Aluminium/Aluminum) - too much simplification and you remove information, after all - but it's totally a personal opinion based on no education at all. While the "our" in colour is subtle, it is different to just "or" (at least over here - in the US colour may well be pronounced differently, in which case it's perfectly appropriate for over there). Given the root of the reforms in a political movement to create a more distinct identity, I wouldn't be surprised if some decisions were made in the process to create difference for difference's sake (given that was likely the whole point of it) rather than for any linguistic or communication benefit (but happy to be proved wrong here as well

).