Obviously, it has a belly-one...
First one looks either pale grey or ecru to me? Either lessens the harsh contrast. Your look is clearly nice but I think would be even better with off-white. *shrug*
I do think that the presence of a waistcoat or jumper (something the above two pics have) lessens my quibble with the look to some degree, due to the simple practical fact of the intervening garment covering a large percentage of the shirt, diminishing the contrast.
As for the Downton looks, I think I'd prefer them all with tattersals instead of white shirts. However, I will allow that a club collar functions somewhat similarly to a BD collar in deformalising/sportifying the look, thus falling under my already stated exemption for white shirts if they're BDs. ;)