I've asked myself a similar question regarding my Mini 2. So far I've resisted because of the price difference between a used Mini 2 and a new Q1. I also greatly prefer the aesthetics of the Mini. The V2 is a great speaker, IMO, though I slightly prefer the Mini 2 which are more expensive. There may be enough of an improvement over the V2 to pay for the upgrade.
I think the only way to answer this question for yourself is to try to hear the Q1 in your system. If you can't find a dealer willing to let you try them, at least hear the Q1 at a dealer demo with similar electronics and source to what you own. Only you can answer the question about whether or not it is worth the price difference to change. There may be some other area in your system which would benefit more for the same amount of money.
I think the only way to answer this question for yourself is to try to hear the Q1 in your system. If you can't find a dealer willing to let you try them, at least hear the Q1 at a dealer demo with similar electronics and source to what you own. Only you can answer the question about whether or not it is worth the price difference to change. There may be some other area in your system which would benefit more for the same amount of money.