.. Ewan McGregor is playing both.. Sonja and Sonia Alexander in the 9-hour movie.. and Ewan McGregor is playing Greg Sanders in the 11-hour movie.. the differance between the two is as simple and profound as that.. to quote Alan Moore.. namely.. Ozymandios... in "Watchmen".. (.. sniff.. oboy.. did I spell ... Ozymandios's name.. accurately..?.. I somehow.. don't think.. I did..)...