diode laser cutters vs CO2 engraving machines

[George @enduranceorobots My Robox is a Blue Commercial Version]

Many people tell me that co2 laser gravers from Aliexpress a good and reliable.
I never tried one but I know that they are pretty expensive and you cannot buy something cheaper than $500.
Can anyone share with experience in using co2 or diode laser cutting / engraving machine? What was good and what was not?

It it a demand to have a tool for 3d printer, some sort of accessory for cutting or engraving?
For me it is very important to understand since we’re making diode lasers for 3d printers and CNC device.

Will appreciate any comments!

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