KLM Flying Dutchman - AMS-DAR

Does anyone the flight AMS-DAR in December is a boeing 777-200ER OR boeing 777-300ER

reason i asking is because on seat guru i noticed they have different seating.

They are dumping tickets from AMS to DAR for 700 euro. They have reduced flights (no on tuesdays) and I am flying the 14th DEC from Dar back on a 772,