I just bought a Samsung 840 250GB as an upgrade from my ForceGT 120GB. I didn't opt for the Pro because I'm really not worried about using TLC NAND, and I was convinced that I wouldn't notice any real world difference between the pro and the non-pro. I've been using the drive for a few weeks, starting from a fresh Win7 x64 Ulti install.
I seem to be able to notice a slightly worsened bootup-time, which annoys me quite a bit. The icons in the tray come sneaking in from the side instead of popping up rapidly, as I'm used to from my GT. I've done quite a few hours of digging around the Internet to substantiate my suspition by looking at benchmarks, but the impression I get is that the 840 IS the faster drive allround, beating up the GT in almost all tests. Except fully compressible data write tests, of course.
Now, looking through old Anvil-benchmarks I've done myself, I see that my ForceGT WAS a bit faster at reading 4K randoms, which I really did NOT see coming (the 840 performing around 25 MB/s, 6.5k IOPS and the GT at 31.05 MB/s, 7.8k IOPS - both at 46% compression)
Of course there is are quite a few sources of error, so I'm not even sure if I can conclude anything from the numbers I have (diff. BIOS/UEFI version, diff. IRST version, diff. OC settings, diff. program versions, free space on the drives, OP etc.).
So my question is: Should I really be able to notice a difference at all, or is something else at play here?