The idea honestly that one cue plays well and the other doesn't is a scenario that just isn't true. If a shaft plays good, and the joint work is flush and solid, it will also play good yes on another cue. The idea of feel is all about perception of the person holding it.
The wide variation of it playing solid and another cue playing like a wet noodle is very far fetched. If the cue butt is built solid, the amount of difference in the cues play will not change to where the feel is that noticable. Many will argue this point, as many always have. Now if the cue that shaft is switched to is inferior or not solidly built, then yes it will play less desirably . that's a gimme.
But my original reply was most of the hit of a good playing cue comes from the shaft IF the cue behind it is solidly built. As with anything their are always the what if's and people who love to ask the question.
I have built many cues, worked with many cue makers and been woodworking for over 40 plus years. I am not implying that all I say is the gospel or the only way to do things. And to be challenged on many posts because I speak the truth of real experience and what can work offends some I believe, while others I am sure will benefit from my posts.
I can say if people try some of my ideas and ways I am offering to do such things you may find it easier and helpful. But I have been involved with many online forums , and for no reason shall I give a resume to anyone for clarification. The original poster can listen, try and see for them selves, or chose not to. I am answering them and offering help and advise, not to those who feel offended because I don't offer a detailed account of myself or what I comment on is different than there way of doing things. This in no way makes me a know it all with no experience.
So thank you for the chance to answer questions here, and if for any reason the forum administrators do not want me to offer advise here, then I will stop. Until then, I offer my advise to any and all who care to listen in hopes it will better their cue building and help them save time,money and frustration.
Thank you