reliability- They're on the bottom of the pile as far as fieldable guns are concerned.
durabiltity-The Lycon is nearly completely plastic externals. I'm not a fan of MP5 collapsing stocks. Mine wobbles, and that's a metal stock going into a metal body. The other two are ok for ABS guns.
upgradability-Not sure about the broxa, but I believe the lycon is a CYMA 0.27 copy, and thus some very critical components like the barrel and hop-up are not TM compatabile.
accuracy- Crap. Crap inner barrels, crap hop-up, crap FPS consistency.
range- Depends on the weight of BB you shoot and how well you adjust the hopup. The Kraken probably has the best hop-up unit out of all of them, but it's still a far cry from high quality guns.
power- WTF is power? FPS means nothing.
looks- I'd take an MP5 over an AK any day, but to me all clear guns look like ass.
"Someone in a Prius tried to race me at a stop sign the other day. I couldn't believe it. I had him for the first 100 feet or so but I can only walk so fast."