enak... Just a word of warning...
Lou likes his music LOUD
Personally, I've been quite happy with the SuperMini and have never approached using the maximum volume (powering Ety ER4P+S adapter). I've been extremely happy with the sound quality, the terrific battery life and the uber-portability. It really is amazing that this device can sound so good and be so small. Kinda like Etys.
And, that version of the SuperMini was made before Fixup added feedback loops to more accurately represent the META42 design. If you are ordering a SuperMini now, it will have the feedback loops which are supposed to improve the sound quality.
From what others have posted about the more traditional META42 amps built by Tangent, Eric343, JMT, KurtW, (others?) they have been described as being more open, slightly deeper bass extension, slightly better highs. Do a search on "SuperMini" to see those comments. But, I believe the differences were described as being fairly minor. Sorry, I don't (yet) have a "regular" META42 (yet) to do the A/B comparison, so I cannot give you my comparison/impressions.
Again, all of those reviews were done with the original implementation of the SuperMini. Don't believe I've seen a review of the updated SuperMini compared to a more traditional implementation of the META42.
If anyone has both and can provide a review or can point me to a review, let me know.