There are some differences everyone can notice while browising MyCE forum pages between most of the early-generation 16GB and 32GB SLC and MLC SSD drives and Samsung's latest 840 EVO. I noticed 840 EVO 120GB is much faster than Mtron's 16GB SLC drive. The latter was once one of the fastest consumer drives.
It's always good to go back in history by a few years, and then 10 years, and then 20 years. Storage Review, once one of the world's most prestigious storage sites, held hundreds of thousands of posts by so-called experts and power users extremely stubbornly insisting on the differences between some of the most expensive consumer and enterprise SCSI HDD drives and nearly "generic" (E)IDE and SATA drives. The "real-world" performance differences nearly always tended to be negligibly tiny. Price differences were on an astronomical scale even for so-called early adopters and self-styled power users.
Most times, the same kind of people chose to ignore very noticeable performance differences between SSDs and HDDs and among different generations of SSDs. At the very same time, newer and faster SSDs were being introduced at radically reduced prices.
History has always taught us people praise overpriced products made by incompetent people while ridiculing inexpensive ones made by daring visionaries. It happens to a lot of the most proud computer users.
A great portion of the computer and electronics industries worldwide is about ideology and cosmetics. And both are more about ego than anything else.