Both are 256x192 core processor and a very small Obj. Go with the one with better battery and warranty.
There both pretty low entry level thermal scanners, they will scan your backyard, and see hot spots couple hundred yards. with any High humidity on a 256x192 core is a killer for good image.
( my advise ) .. You should try to swing for a budget going to at least a 384x288 core hand scanner to be happy.
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