Good that I waited a bit with buying it, just found one for 3.70 USD with shipping on eBay
Anyway, I agree, the model is way too similar to Lofty Libram (Grimoire has rounded corners, Libram has them sharp) and the skin is very similar, too.
Pet Battle-wise (PvP point of view) Grimoire seems to be the better one, very Warlock-style, with this combo: Curse of Doom
- Fel Immolate
- switch another pet