valve spring height question

just to compare the #911 spring (i have know)

#911-16
rate 373lbs
1.110" ID 1.524" OD
seat load 122 at 1.900"
open load 309lbs at 1.400
coil bind height 1.200"
with damper

i think the 972 spring will even fit the retainer better.
what do you guys think? thanks