The question is not, "What's the difference in DOF between a 60 and and 105 lens?"
The question is, "What's the difference in DOF between a 90 and and 105 lens?"
According to you chart, at f/32 and 0.5 feet the DOF is as follows:
60mm DOF = 0.49 to 0.51 feet
105mm DOF = 0.50 to 0.50 feet
I assume that DOF differences between 90 and 105mm lenses are nill.
The question is, "What's the difference in DOF between a 90 and and 105 lens?"
According to you chart, at f/32 and 0.5 feet the DOF is as follows:
60mm DOF = 0.49 to 0.51 feet
105mm DOF = 0.50 to 0.50 feet
I assume that DOF differences between 90 and 105mm lenses are nill.