Another test is to take a small weight scale and weigh the Bosch and weigh the other filter. The weight is not totally the only way to prove the better filter but it is one of them.
K

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1989 420SEL 105575 miles
Pearl Black/Grey

1990 Chevrolet E-Cab C-1500
293,000 miles

1989 Olds Toranado Trofeo'
132,000 miles