As Bugs said all you really need to do is look at the previous sales of each home. The first one was last sold in 1997 at a price of 177k. Without any reassessment this home was limited by prop13 for how much it could increase each year. Obviously this is the one with the 66k land assessment. The other one was sold back in 2005 for a price of 575k and the assessment is obviously much higher.
Again though, I would rent for awhile before buying.
