You are correct, Derek, the chisels from the late 90's on were of poorer quality. When Record took over the quality took a nose dive. The early Nooitgedagt chisel were much, much better. However, they were indeed a bit thicker than the original Berg chisels and the lands were indeed larger. Apart from that they were very well machined and they took a very keen edge that was wear resistant. I should know, I've used them for years when I started out as a shipwright.
And just so you know, my dad's friend who worked for Nooitgedagt for 45 years told me they were modelled after Berg chisels.