I own a NuFace Trinity and a NuFace Mini.  While I have achieved subtle but favorable results with NuFace Trinity, I get lazy and don't use the device as often as I should.

NuFace Mini looks almost identical to NuFace Trinity.  The main differences are:

1. The size.  NuFace Mini is about 1/3rd to 1/2 smaller.

2. The charger.  NuFace Trinity has a nice stand/charging base while Mini has a jack on the bottom of the unit.

3. NuFace Trinity has interchangeable heads and comes with the Trinity tool.  NuFace Mini has a fixed head.

4. NuFace Mini is cheaper.

I'm candidly not sure about power output.  It seems similar.  I believe that this process works but you have to stick with it.  I prefer NuFace Trinity because it allows for more flexibility due to the changeable heads.  But both are worthy additions and should improve your appearance, again if you are willing to stick with it.
I own a NuFace Trinity and a NuFace Mini. While I have achieved subtle but favorable results with NuFace Trinity, I get lazy and don't use the device as often as I should. NuFace Mini looks almost identical to NuFace Trinity. The main differences are:

1. The size. NuFace Mini is about 1/3rd to 1/2 smaller. 2. The charger. NuFace Trinity has a nice stand/charging base while Mini has a jack on the bottom of the unit. 3. NuFace Trinity has interchangeable heads and comes with the Trinity tool. NuFace Mini has a fixed head. 4. NuFace Mini is cheaper. I'm candidly not sure about power output. It seems similar. I believe that this process works but you have to stick with it. I prefer NuFace Trinity because it allows for more flexibility due to the changeable heads. But both are worthy additions and should improve your appearance, again if you are willing to stick with it.