Doubtful unless you wear your diapers ;)

HKG is just a lot more fun than Tokyo. (IMHO). Also love the hotels, food and yes, even the rudeness. Think of a Far East New York City and you'll get the idea.

The setting of Hong Kong sandwiched between a mountain and the harbor is too spectacular for words. It's a thrilling and exciting sight and it never gets old (mostly because there is a new skyscraper each time I look!). Kinda like NYC that way; I never get tired of seeing the skyscrapers of Manhattan. They're awe-inspiring. I guess I'm an urbanite :)

As for rudeness, perhaps that's the spoken language? Japanese is very genteel and flowy and the people are such but Cantonese is a somewhat brusque and halting language. Perhaps that's where the perception of HKGers being rude is formed?

FWIW, I've never encounterd rudeness on a commerce level in HKG. The staff at the airport, subways, restaurants, hotels, shopping malls etc. are all extremely pleasant and helpful.

BlueDC, you got quite an idea. Cantonese is a very fast language, and there is a major difference between western and chinese cultural practice. As fas as people talking loud, it is a cultural thing that they use even during meals. You are supposed to talk loud. Another example is: You are supposed to eat noddles loud with noise of enjoyment to please the chef in Japan. For western culture, it might be rude, but it is considered in the manner in those places.

Also, please be informed that Hong Kong government banned smoking in all public enclosed places: Shopping mall, bus, subway, train etc. If you are in an restaurant, you can be asked to be seated in a smoking area. I personally don't smoke and find it a plus for me!

I'm jumping in late but I've got to get my $0.02 in...

First off to state that I've lived in HK and my wife is from Tokyo (which I've visited many times) so I've got some experience behind this.

For a first time visit, go for HKG. Waaayyy easier if you can only speak/write English (as opposed to Chinese/Japanese) and way more people actually understand English as well. The metro and bus system is extremely simple to understand. If it's a short stay, you'll have enough to do. However, I really feel it's quite overrated and if you're there for more than a week, it'll start wearing thin. Yeah, it's a short hop to Macau but how long you stay there depends on how often you go to Vegas. ;)

As for Tokyo, woo-hoo! Definitely one of my favorite places (in the world). As others have said, you find more and more as you "peel back the onion". How about doing a side trip to the hot springs? It's also a very short hop to Kyoto/Osaka. However, you definitely need a lot more patience due to the dearth of English and you might not get to the "good" places if you don't have someone take you around. Understand the metro on the first try? Good luck! Multi level platforms and with some trains making every stop, some every other stop, and some every 4th or 5th stop, it's pretty bad. BTW, your guidebook will show the stops but won't tell you what trains do what.

As for food? Well, the range and quality of food in Tokyo is incredible. Most top restaurants around the world have a branch (and sometimes the only branch) there. La tour d'argent, Taillevent, Enoteca Pinchiorri, etc. However, I find the Cantonese food horrible, yes, even in Yokohama Chinatown.

In HK, the Cantonese food is incredible of course. Other food? Well, so-so. But, it can be cheap so it's balanced. Yeah, they have the continental restaurants as well but I find it's just a notch below.

Ok, that's my $0.03. :D