MFillmoreIf it rolls different tube sizes and you want to play through them, sure. Otherwise you would be getting something similar if you aren't getting any hum from the little dot.
MFillmoreCompletely different amps. I have (and enjoy) both. The Darkvoice is a much more powerful amp and uses better tubes. I use the DV for my higher impedence headphones which the little dot struggles with.
I do love the little dot however with the right tubes. I have c3g tubes (with a c3g to 6ak5 adapter) for the drivers and use 6sn7s for the power tubes (with 6sn7 to 6n6p adapters). This makes for a wonderfully detailed sound that works well for my lower impedence cans as well as my planars.