Bird Quiz: Ambiguous male Stonechat

Stonechats are beautiful birds, usually exposed in end of branches and easy to take photograph. I saw this male yesterday at Vravrona Estuary, and seemed to me it did not have too much orange on the breast, longer white collar, the rump and scapular patch were white.
I wonder if he might belong to a split species of Siberian Stonechat (Saxicola maura)...






And here are some pics of a male Stonechat (Saxocola torquata), which a usual fully orange breast