Click Here To Visit The SRGC Main Site
The reason Sandersii Group is a group is that there are very many which are well-nigh impossible to distinguish by appearance. Probably some are good doers and others not, some flower early or later but they all look much the same. I don't know what grounds Ian Christie had for selecting "Chatton" and giving it a name. For that matter, forumist 'snowdropcollector' has one called 'Elles Dream' http://www.srgc.net/forum/index.php?topic=10034.msg266090#msg266090 but again it looks like just another Sandersii Group snowdrop to me.In the snowdrop world we are in danger of being swamped by names. Sandersii Group is one of the most sensible rationalisations of nomenclature we have, so should not be disregarded lightly.
From past experience I know that Ian names snowdrops that do well here in Scotland.
I don't doubt that Ian had his reasons. I looked on his web site and you can buy Sandersii for £8 or Sandersii Chatton for £15. But I couldn't find any mention of what, apart from the price, is the difference.