2 and 3 - ceiling wall corner temperature difference
4 and 5 - timer and GFCI outlet
7 and 6 - stove, warm electronics powering clock
8 and 9 - eneloop charger
11 and 10 - heat vent next to fireplace
13 and 12 - another wall corner temperature difference
15 and 14 - ceiling fan remote receiver is warm
0 and 1 - water under floor?
General comments - Even when I 'disabled' MSX on the Flir, it was definitely more temperature sensitive and could pick up much more subtle temperature differences. I disabled it by putting my finger in front of the lens.
The Flir does the calibration shutter click every 20-30 seconds, while the Seek does so every 3-5 seconds. The Flir lasts about 45 minutes on battery, so not much, but enough.
While it looks like I might have cherry picked examples, in general, I could not find an instance where the Seek did better. Yes, the MSX is definitely an advantage to the Flir, but I see no reason not to use it since it's there.
At the same price, it's hard to go with the Seek. I do credit Seek however, with starting a competition with Flir, causing all of us to benefit. One last Flir advantage, it works with Flir tools and the images also include a visual image you can slide up and down. These images are both from the iOS version.