Many many thanks Pachuco and Trek for your quick responses!

Yes, by duplicate I meant bootleg edition

So all the titles listed on amazon as "Studio: Resen" are actually BD-R? I could trace most of those to releases from other countries so I suspected they are not "official releases". It's weird to me amazon sell such titles.

Maybe it is better like you suggested to make the effort or wait for a more established studio to release it.

I almost ordered Prizzi's Honor (El Honor De Los Prizzi) but thanks to this forum I know to avoid it at all costs
I already had titles from Producciones JRB and they were all terrible.

thanks again !