Just to add to Bills post, as he says, a quality core that is designed to perform well, rather than just come in under a certain price point will normally provide excellent imagery in most operating conditions and will sometimes out-perform a higher resolution, but cheaper build, core. Many professional cameras employ resolution enhancement using interpolation so that a 160 x 120 pixel FPA presents 320 x 240 pixels to the display or a 320 x 240 pixel fpa presents a 640 x 480 pixels to the display. Interpolation is not just pixel multiplication through duplication if done well. It is computation of a pixels value and those around it to create new pixel values that offer new levels rather than just duplicated levels. Interpolation can get very smart but never actually produced new raw data, only an interpretation of raw data to produce a nicer, higher pixel count, image
Now in the bad old days of digital photography, interpolation was considered an ugly word as true optical resolution was what counted. Whilst, to a degree, this remains true with thermal imaging systems, interpolation can provide very useful and impressive image enhancement and when pixels are very expensive, it can offer excellent, low cost, added value for the user. I personally consider 160 x 120 pixel fpa‘s the minimum useful resolution for my tasks. I do not have an issue with that relatively low resolution because I use industrial and professional cameras that make the most of it, unlike, for example, the budget Lepton based cameras that really cannot do much to improve the Lepton output without changing the lens. As for Seek Cores, well they may have higher resolution but they have their own challenges with noise in low Delta T images that, in my opinion, offsets the resolution advantage in some usage cases. I certainly like my Seek Reveal Pro QVGA cameras though