The DXO lens scores make some comparison possible, but for instance sharpness is only one number covering all apertures - that is not very informative...
An 1.4 lens is made to be used wide open and central sharpness is more important while a TS lens is made to be used at d8-11 and has to be sharp from corner to corner..
Also they use a MPIX number for sharpness that makes not much sense - the center of a lens can be easely above 50 MP while the sides suffer..
Af speed is not included- the 1,8G 50mm Nikkor is almost as sharp as the 1,4G at 1,8 but it has a much faster AF. That was for me the reason to choose it...etc
Their information on lenses is so general that i would prefer other test-sites like Photozone etc...
The sensor database i find more interesting for it is the only good reference on sensors as far as i know...