I recently bought a new standard RB antenna and noticed some slight changes in appearance from my original 1998 jobbie.
The most significant of these is that the cable appears to be slightly thicker and provides lower signal loss. I have run the two aerials side by side on test for a while and I seem to be getting an approximate 10% improvement in signal quantity/distance.
There are a number of alternatives here: my older aerial is down on performance, my observations are rubbish, too much grape juice at lunchtime or the new aerial is in fact better specced and giving better results.
The only people who know for sure are Airnav. What say you Airnav?