Affordable vs. ultra expensive speakers - what's the difference?

About $48800

It’s difficult to judge a pair of speakers based on the frequency response plot

True, that's why I look at more than the FR plot. If I can't find extensive measurements on a speaker I don't even look at it. 

I haven't seen any measurements on YG other than some back in 2013 on Stereophile and those were nothing to get excited about. If you want aluminum I'd take a pair Genelec 8361a for $10k with GLM and adjust to my room. For another $16k toss in the W371A and I'd be at my end game.

Those big MBL omni's aren't everybody's cup of tea but then again neither are Audio Note, Devore Orangutans or those awful Volti's. 

But as to the Rivals, you are the first I have seen to call them "awful". Where did you hear them, which models, and with what ancillary gear?

I haven’t heard them nor am I apt too. I haven’t heard Border Patrol either nor am I apt too.

I could use DSP and EQ the crap out of them so perhaps awful is to strong a word, maybe extremely nonlinear is what I should have said.

I’ve never jumped off a skyscraper either but having a basic grasp of Newton’s laws I can make a guess what would happen if I did. I don’t understand how anyone can’t look at speaker measurements and the components they are made from and get a pretty good idea what they will sound like. Is that to bold a statement?

Volti Razz?????? LOL  Really