Thanks for that input. Looking through them in a store just doesn't give a good feel for how they'll work!
Also thank you turtle and zero for the lessons, I always assume that the names for these are marketing.
There are a lot of marketing terms used in riflescope descriptions and advertising; there's no denying that. But there are some terms that are actually meaningful and one of them is ED. It's meaningful because it is actually a type of glass that was invented 30-40 years ago by camera lensmakers to control chromatic aberration. The best type of glass for that is pure fluorite crystal glass, like the one in my Kowa Prominar 883. But that type of glass is expensive, fragile and susceptible to rapid changes in temperature, all "qualities" that are contra-indicated for riflescopes. ED glass is more expensive than regular optical glass and behaves somewhat differently so you can't just substitute it for regular glass in an optical device without having to redesign the whole thing.
Around the turn of the century, I believe Nikon introduced Super ED glass, a type of glass that very closely equals fluorite glass for controlling CA, but that's also yet another redesign and it's more expensive, and so on.
As I have mentioned many times in the past, DEON is the first riflescope maker to introduce ED glass into the riflescope world and indeed all their scopes with an objective greater than 24mm, are using ED glass, with a few other exceptions. The riflescopes in the High Master category use Super ED glass, and DEON is the only manufacturer on the planet using Super ED glass at the moment. Their new Majesta uses this glass, along with the March-X 10-60X56, the 2 Genesis models and the -FX 5-42X56 and the -FX 4.5-28X52. The two fixed power, 48X52 and the 40-60X52 EPZ also use Super ED glass, but a different one than the other.
DEON has many articles at their website talking about ED and Super ED glass; they use the real stuff, and they brag about it. I have seen other sites that use ED glass, and they call it ED as they explain why they use it. I have yet to see a site that claims HD glass does anything about CA, because it doesn't; it's not ED glass, they just want you to think it is by serving a salad of empty superlatives.
Kowa (the spotting scope people) also have a type of glass they call XD glass. They explain that it is ED glass, I can easily be persuaded to believe it's a type of Super ED glass; I just can't find the Abbe number for that glass, yet.
Just remember, if it says HD, it's probably hokum.