I think I may see a thin white line where you say, but I don't have a magnifying glass to make sure. It's sometimes hard to tell how much processor bump I got, when browsing the web, because my 4G LTE connection has a lot of latency and my mifi goes dormant between pages and needs to get woken up (annoying!). Aside from that, it's easy to see the speed increase. For most common tasks it may as well be my SP2. I was checking for driver updates and saw that they have a Bios 1.17 that's supposedly updated, not on the original Q584. But when I checked I found that mine has 1.18, so there's nothing that needs updating. If you or anyone does a real color profiling I'd love to beg a copy of the file. I, too, tweaked it a little towards the blue-white. However, it looks like a different white depending on ambient lighting. There's no substitute for an objective, instrument-based color profile.