I am regretting a little not backing this, but I do have stacks of unpainted stuff. The zombicide stuff looks pretty sharp and well detailed, if they are like the Blood Rage minis they are easy to paint too. Funnily enough, though the Frostgrave stuff is hard plastic and theoretically sharper, in that photo it looks less detailed - maybe that's just down to the sculpting.
The Frostgrave (FG) stuff is "softer" as far as the sculpting is concerned on the plastics. To give you a comparison, look at the FG soldiers compared to any of the Perry Miniatures (PM) kits. The PM stuff is very sharp and clean where the FG Soldiers are "softer". Both are cast by Renedra. On another hand, compare the FG soldiers to the kits from Gripping Beast (GB). They are equally "soft". Same sculptor, IIRC.
I also regret not backing ZBP, but when the KS was running, I was nowhere near any fantasy or medieval stuff, so it was easy to let it pass by.