@biohacker, I'd be interested in hearing details as well, if you'd like to share them here.
They are both great devices and much better than the Yocan Evolve or XMAX V-one ceramic donut atties. The Stone Smiths' Slash is also a very good new device out of Canada that also has the usb-c charging like the Stella. It's definitely a nice touch! Puffco's design is now 5 years old, but still holds its own quite well. I haven't had mine for long, but my atty is doing great and i'm loving it.
The Stella has a nice magnetic cap and even bigger ceramic bucket, and the taste is incredible, but it doesn't output the higher temp "clouds like the Puffco". It's more of a cannasseur taste saver sesh pen!