I use a Lee 4 - die sets for 9mm, 45acp and 40SW.
I also have a Lee 3 die set for .38/357 as well as a FCD for it. I do not use the FCD.
I have used a Lee 3 die 9mm set in the past, as well. IMHO, no difference in ammo ballistic performance or functional (feeding reliability) performance.
On the 4-hole turret, you need 4 pulls to make one reloaded cartridge. You could have gotten a 3-hole turret for your 3-die set. No biggie.
You should be GTG.