Probably an OC-2 reissue but honestly I think the entire line is just a cash grab. I highly doubt there is any difference in build quality. I mean, have you ever broken a standard Boss pedal?
Can’t speak for every Wazacraft reissue. But the DC-2w Dimension C ups the game on the original DC-2 by including an SDD-320 Dimension D mode that gets the sound of the old Dimension D studio rack unit. So you’re getting two distinct effects for the price of one. It also has better switching and offers stereo in and out. It’s not just a straight reissue despite sounding like the originals. You do get a lot more for your money with the DC-2w compared to paying insane amounts for an original since those are now considered collectible.
Of course if you just want the Dimension-C sound, and don’t want or need stereo (although that feature really makes me prefer the reissue over the original because it’s one effect that really shines and sounds truly amazing when you output in stereo) the Behringer CC300 (since replaced by the TCE 3rd Dimension) will get you 99.9% of the sound of the original BOSS pedal for around $60 USD street vs about $240 for a gen-u-ine DC-2w.
Cool effect.
Another cool “static chorus” or “antichorus” pedal is the Luxe from DigiTech. I got one on sale for $40 and it provides a similar but not quite the same sort of sound since all detuner type effects are basically a chorus minus the LFO which provides the modulation component in a traditional chorus pedal.