If you have been keeping up with the MiSTer forums, you will know that there are now at least two DE10-Nano clones being produced, with one, the QMTECH version being available now, and another one due soon.
The one pictured is the QMTech version, and this one has the 128Mb SDRAM fitted direct to the rear of the PCB (rather than plugged onto GPIO_0). This has the advantage that it passes ram tests at 160Mhz.
It also comes in at a much cheaper price than the official DE10-Nano board. I purchased this one with delivery and taxes for £133. (Official DE10-Nano + 128Mb SDRAM module would be around £290)
So, the big question is does it work with the Astrocade interface ?
The answer is … Yes, it does. I connected it up to my interface and everything appears to work as intended. The OTG USB socket is a normal type A socket, rather than the mini-USB, so you need a different lead to connect it up.