Thanks for the info....
I believe they are NG's as they are liveried as - 600's on the fuselage of the couple we were holding behind...
Can't say I've ever seen any other NG's without winglets - I've always assumed no winglet = 300 / 400 / 500 series....But I'm not a spotter / techno-nerd so don't know of any visual differences other than the winglets...
But strange if the winglets are basically to improve performance on longer stage lengths as Hungary to more or less anywhere else in Europe not served by RJ's and T/P's could perhaps justify the extra purchase and operating costs involved....