Have just been doing a bit of research on the Hyper 212 variants and find it a bit odd to see the differences in quality pertaining to the thermal block and heatpipes that is evident between the "Plus" and "EVO" versions. They seem so similar in basic design and build that it's hard to believe they wouldn't come off the same manufacturing line with the same processes. From what I can discern this is the only real anomaly between the two that screams unique manufacture process. I say that only because the product has such a difference in fit quality (copper to aluminum) it seems there would have to be more than simply an additional fine finishing step. I know the block is also of a slightly different design thickness but that alone wouldn't really warrant an additional manufacturing station, maybe a simple die or mold swap.
What got me thinking about this was finding out the "Plus" is a bit older but not finding any references to block/heatpipe fit-n-finish having been improved pursuant to the "EVO" release. So I assume the "Plus" versions being sold today are either long term inventory stores or, as I suspect, they actually do have different production lines for the two models.
As stated - Simply Curiosity prompted this post. I'm already in for a "Plus" simply to quiet an old HSF on an old stock Athlon 64.