Rob, I assume you are asking how much truth is there in G&G and Luger being especially expensive and, also, whether it's fair to compare the places as being meaningfully similar when Luger's steak is universally heralded, while G&G's is not.
I do think that G&G's prices, especially the sides, are a bit more than other top steakhouses around town. The steaks (which do not have weight noted) are particularly large, however. I think the bone-in strip is 20 or 22 oz., for example, and costs $35. One can cut costs there by going with the freebie potatoes (and salad? I'm not sure they still offer the sad little free salad now, since I always get te garbage). The sides are steep. The garbage salad is 20 bucks. But this is all generally in the same high plane as the spots you mention, I agree. I think that the many critics of G&G would rather pay these prices at a more polished place with frendlier service, however.
What about Luger's steak? Is it simply so much better than any other that even demanding gourmands used to places like Les Nomades are willing to go there for a hunk of meat? Hard for me to say. I do think that Luger benefits from the NYC badge of honor that New Yorkers award themselves for eating at famous but hard-to-get-to, dumpy, or abusive places, so long as the food is supposed to be good. Chicagoans, present readers excluded, seem to have a hard time with that. Maybe like Mayor Daley, we are a little ashamed of our gritty past, and would rather have a jamba juice standing where Jim's used to be on Maxwell. Then there's the coastal Gourmet/Food & Wine factor. If you plopped G&G into Queens, would not the glossies and the NYTimes call it a loveable, gruff old monument to manly eating?
And how do G&G's steaks stand up? Not dry aged, but they no doubt have access to some pretty good stuff, considering that most prime beef still has to pass through Chicago (Allen Bros., Stockyards, et al.), and no one has been placing orders for prime longer than G&G. I've never been disappointed in the meat, which is really what it's all about.
Lots of detractors seem to say, the meat was fine, but I hated XYand Z about the place. And, how much meat can you eat. Things like that. Well, I have to think that these folks wouldn't really enjoy a dump like Luger, either.
FWIW, the Sterns seem to love G&G. It might be the most expensive Road Food on their site. I don't always agree with them, but they know their audience, and its not folks deciding between Roy's and G&G, its people looking for "real" places to seek out, on the road.
PS, I'd put Sparks in this group, along with the first Bob's in Dallas. Murray's in Minneapolis and Bern's in Tampa are close cousins. They are "fancy" instead of gruff and rough around the edges, but they are faded fancy.