Samsung, bit more pricey but both my ssd and ram are both Samsung chips and I haven't had a single problem with either.
E. Seems that further down the thread someone is saying Samsung is having issues too, which is dissapointing as I've always trusted Samsung.
Ye definitely hit or miss, they've been excellent for me. I got the 970 EVO last year or the year before and it's been rock solid, my RAM is also Samsung chips albeit B die so higher bin which probably explains why I've never had a single issue with them in 4 odd years.