This morning, I spent more time listening to the Min 10 & 20. I've come to the conclusion that they're both the same speaker (no surprise there). The Min 20 is a fuller & louder speaker but with a Subwoofer engaged, it's flat out hard to tell the difference. If someone wants the speaker that has the ability to play louder, it's definitely the Min 20. I have just over 12 hours of play on the new speakers. If the Min 20 improves from where it's at now, which I doubt will make much of a difference in my listening tests, I'll be sure to let everyone know. Bottom line for me, I don't feel that I needed to add the Min 20 in my small room but time may change my position.