Yes, 10A cells will work fine in the BLF Q8. The Samsung 30Q cells are actually 15A cells (continuous), so you won’t notice much difference in output. The 10A cells will put out slightly less light (due to greater voltage sag), but you’d probably need a light meter to notice the difference.
I’ve run the BLF Q8 with 4 amp cells. I notice a big difference in output compared to using Samsung 30Q’s, but it still works.
The BLF Q8 uses a FET driver for its higher outputs. So, it will attempt to draw as much current from the battery as it can. But, lower drain cells have much greater voltage sag under load, so the voltage across the LED will be less, thus lower output. It also means lower current use, so you don’t have to worry about drawing more current from your cells than they can take. As long as they can deliver at least 4 amps safely, you should be fine using that battery.
I’d suggest a high drain cell, though, simply because you’ll get more output, and the cells are built to handle high current so they’ll last longer. 10 amp cell is still quite good.