Let’s see if I’ve got this right.......
We have two sets of springs, from two different head manufacturers, but we don’t have any observed data(loads or heights) for either set of springs....... and you’re wondering if one set will be better than the other....... for an application that you haven’t defined what the spring requirements are.
Uuuuhhhh....... nope.
Even with that wealth of information posted on those springs, I don’t have an answer for you.
I’m going to refer back to what I was getting at earlier.
It’s not that hard.
Talk to the cam grinder and get their feedback on the spring load requirements for the cam.
Measure the installed height on the heads.
Then.......
A- have the springs that come on the heads tested at that height and see if the specs match up with what you need, or
B- buy springs that meet the criteria the cam grinder suggested, that will work at the installed height of the heads.