On this page you can see what the different coolers
are for and how much they cool.. and their purpose
EDIT
all these things are is a heat exchanger... the more fins
you have contacting the tubes the more heat is pulled
off.. until you start loosing the air flow across
the fins.. if the plate style is so good WHY isnt
a radiator made this way... the plate has its place
and its used for engine oil... the fins on a plate
are much thicker(less per inch).. a lot of times guys
use what they buy without really knowing what to buy
or were told that it works good... but if you dont
try BOTH you wont know which is better... I can say
I have tested both... and if you follow the Hayden
direction you wont be sorry.. by the way.. when I
say "tested" that was at work and on my own junk with
thermocouples on the inlet and outlet to measure the
temp drop.. if I still had my data I would post it
but I threw it away years ago
http://www.haydenauto.com/upload/HaydenAuto/Documents/Cat_Hayden/Transmission_Engine_Oil_Coolers.pdf