currently building a 13b-re/lt8/gt35r/mid-mount intercooler fc. of course aluminum radiator

i have 3 of the waterpumps

s5 t2 w/p
cosmo (twin thermostat)
and fd3s

which would be most efficient for cooling out of all? what i mean is a all round DD to a autox/circuit/drift/drag as a senerio let say..

id like to hear everyones opinion and experiances mainly and thoughts

 

take a look at the impellers. are they the same? post pics if different.

 

between the cosmo and t2 their the same