I had one of these many years ago. You can just check the interface board connector. If it's a Commodore IEC plug it probably won't work with the Amiga. As I recall you can swap the interface board for the IBM Parallel port style. Finding that unicorn may be another matter
I believe the Okimate 10 is a 9 pin (thermal element) and the Okimate 20 is 24 pin (thermal element). The Okimate 20 made a much better color print. Both were quite expensive to use, on the order of $1.00 per color page 25 years ago.