AS Awards on AA and DL are lower cost than on BA and AF.
Actually:
http://www.alaskaair.com/as/mileagep...ardsEurope.asp
AA, AF and KL are all at 100K for business class (AA "two class" TATL is using a not-quite-lie-flat seat). DL is a bit cheaper at 90K. Don't know if you'd get lie-flat there, though.
spending the extra miles for BA
And the extra "fuel surcharge".