The amounts of the tax assessments will vary widely based on what their prior sales prices were like. If the most recent sale on one of them was in 2000 and their other in 2005 the assessments for each would be different by 100% or more. And those differences would be divided by land and improvements, the former showing more increase than the latter.
Regardless, the properties will be reassessed again if/when they sell, and those assessments will be based on the sale prices.
Other than that, I’d suggest you stop looking at assessments altogether. You’re not going to learn anything relevant about the property from an assessment.