I paid for both of them from my own cash, no extra price reduction given or payment.
Got OrCam MyEye 2 used unit in great condition from a person who sold it because original user died and he had no idea what to do with it and wanted to sell to someone who will use it. I use it 5 months.
Advantages: you can wear it on any side of your existing glasses your choice, form factor, for now more reliable text recognition, more polished, more comfortable, doesn't heat up, has auto flash if light is too low
Disadvantages: battery life - yes you can load it with any powerbank on the go but even on standby or turned off it loses battery life, no updates no new functions only once a year it can be better for such prices, only 3 languages you can't change if you want different ones than preinstalled for your region you have to buy whole new device again from other country there's no free choice of languages!, no protection from rain drizzle or moisture, it works well with simple fonts but when it's a bit skewed or decorative or atypical it doesn't recognize text at all which is often now in stores same even for simple font but behind a bit reflective plexiglass
Few months later I learned about EnvisionGlasses preorders (super early bird and early bird offers were gone already) i still got regular preorder offer with Smith Optics Frames only those are having possibility to install any kind of lenses and are much more stable. In the box there were thin wires Titanium Standard Frames as well. It has great potential to grow but for now it's in my opinion in kindergarten.
Advantages: light drizzle resistance, it's actually Google Glass Enterprise 2 hardware so porting your favourite apps and services from Android should be possible devs from Envision are open to cooperation, video calling for help assistance and other person sees what you see live (like BeMyEyes or free Aira but for your trusted persons), handwriting and atypical decorative font recognition, live subtitles reading, longer battery life than OrCam, frequent updates and faster fixes, apps and services platform, you can import scanned text to app
Disadvantages: no camera flash if it's too dark it won't detect anything or you have to turn on light source, there's no point to read gesture or any point gesture it read everything it sees in 180 grade field of camera vision, no rewind/forward gestures, it warms up after a while of use, unit is build into frame so you can't adjust it to your head shape, you can't adjust speech rate/volume durning output if you go back to device settings (you have to) device forgots all the text and you have to start all over again, 80% of features works only trough WIFI, it's a whole body device camera is fixed to the right side little display prism sticking out in front of your right eye (you can't change it's position to left side or dismount) you can turn it off control touchpad is on right side as well there's no voice commands (hopefully they add them for hands free use when walking with cane)
Any questions AMA