Ducky Shine II is a better board in my opinion. I've tried a QFR and I've owned 2 Ducky Shine IIs. It feels more "solid", has a better quality neater PCB, backlight (which you can turn off if you don't like it). Subjectively, I also much prefer Shine caps to stock ABS QFR caps.
Shine III doesn't really have anything functionally superior to Shine II: mostly just more backlight modes and RGB backlight in the spacebar.