Anyone that purchased multiple units seeing a large range of chip temps by unit?

One of my units is showing 105/79 and 93/103.  The other that is sitting right next to it, with same airflow and ambient temps showing 70/70 and 55/75.  Doesn't make sense.  Do you think the lower temperature unit is reading the temps incorrectly by chance?  The other 2 R4 batch 1 unit chip temps I have in the room are all about 88c~