yeah mr. nice is the original breeder and critical + is just an s1 of mns's CM. Dinafem has a lot of mns knock-offs in fem version I'd go with mns though as Dinafem can't breed there own shit they just make s1's of other peoples hard work.
Mr Nice critical mass is just a knock off of Nevils Big bud lines.
I could say MNS can't breed shit, witch is why Nevil left MNS.
Dina fem , MNS and many, many others still work with Nevils "the seed bank" lines.
I would go with critical + over CM any day. (Based off my friends smoke reports.
You'd have to go threw 20 seeds to find a good pheno.
Dina fem has already done that selection.
I loved the Origional amnesia haze, and the Auto haze of Dina fems.
But Classics Old big bud strain from Cali sounds great...