The Pilar is for sure my favorite design among Vox's small knives. But as others have mentioned, the execution from CRKT is super inconsistent, which really sucks and kinda kneecaps a really great design. I managed to get a CF/D2 steel model that is pretty good, and I'm happy to have it, but I wouldn't even try one of the base models with the 8CR13mov steel.
I like the look of the Suru, but I'm not sure how practical of a cutter it wold actually be with the upswept tip on such a small blade. And the Maniago knives' M390 seems to be getting more and more questionable the more testing it is subjected to, so that's kinda made me steer clear. The Giant Mouse Ace Biblio is pretty cool design-wise, especially the TI version, but it's on the edge of being more of a mid-sized folder.
All things considered, I'd sat a Pilar in CF or one of the G10 scale models, with D2 steel is probably the best small Vox option around, especially if you can order from a dealer who will check the QC on it. That's my pick.