If it didn't matter, then why do the OEM still highlight low-compression, high-compression, super soft core, etc. on their boxes? To me it sounds like it does matter, but they don't want the player to know the real number so they can't compare/classify their products.
On the other hand, I read that due to the different technologies in the core, mantle, cover, etc... the compression will feel different. For instance, Callaway Solaire is supposed to be a women's ball, but it has a higher compression than the BB Diablo. After hitting a Diablo and my wife's Solaire... I felt the Solaire was still softer and mushier. So how can that be?
And that is why I asked in the beginning... does matching your swing speed to a compression number still apply?
Take another example... I was at the pro shop testing out balls. I was looking at a premium ball.
You had the Callaway i(s), Srixon Z-Star and ProV1. The fitter recommended these 3 softer models for my swing speed (as opposed to the i(z), Z-Star XV and ProV1X for 100mph)
But if you look at the chart, the Z-Star XV has a similar compression to the i(s) and ProV1, so the rule wouldn't apply.
This makes finding the right ball so hard
Adams Speedline Fast12 LS 9.5* w/ Fubuki Alpha 60 S
Cobra Baffler T-Rail 16* 3W w/ Cobra GD Tour ADSold my hybrid... who needs a hybrid anyway?
Mizuno MP59 4-PW w/ KBS Tour S
DTG Inazone CNC Spin Wedges 50*, 54*, 58* w/ KBS Tour S
Nike M9 Cartbag / Clicgear 3.0