I think everyone's gotten sidetracked by my original comment. I never asked why get one but if there's more so a significant difference in the more expensive ones besides low deflection shafts as he usually rags on people with cheaper cues or gets mad if I play em with a house cue thinking I'm going easy on him
Expensive cues have better wood. Cheap cues have "soft" wood and not a lot of care go into their production. Poor tolerances, poor quality control, bad materials etc..Sometimes you get a "golden" example which plays brilliantly, but at other times you get a very poor feel.
Expensive cues have care put into their production, especially custom cues which are hand made and tuned. They can't put "matchstick grade" wood into their cues, because they'd lose their business. Typically the balance is better and more natural etc.. This goes for middle- to high-end production cues as well as customs.The biggest, most noticable difference is the feel, though.
Truth be told, if you pay 150-200 dollars you'll get a very playable cue. Very few people would feel that cue held them back significantly. Cuetec r-360. like Shane uses, is one of those cues. I've played extensively with that shaft and it's quite nice, but I don't like the feel. I want a "crisp" feedback to my hand, because that way I know my stroke is good. If I let up on a shot with a bad cue, sometimes I won't immidiately notice, because the feedback is muffled. Then I risk having my fundamentals slide downward without noticing. Also it feels nice when you get a nice "ping" instead of a dull "thud" when you hit the ball.
As for your house cue comment...What would you think if your mate challenges you to a swimming contest, to show up with small lead weights attached to his body, not enough to drown him, but enough to slow him down? Would you feel slightly insulted by this? What if you wanted to play you tennis, but he chose to use a 2*4 piece of pine instead of a racket? Those are extreme examples of the emotion you friend is having. It may not be warranted, but one certainly can understand it.