Fed heavyweight 3.5" 6s vs 7s??

[Britton40]

I'm like the rest of you guys, love constantly playing with these guns. I've never messed with the fed heavyweights in a 12ga.  Would you prefer the 6s or 7s? And why? I've got a browning gold 3.5" 24" with several chokes to mess with. Pg 670, jh 670, rob roberts 675 and a kicks 680.  I was kind of leaning messing with the 7s. Seems like a lighter payload for a 3.5" shell(1 7/8oz). I've been told they have dang good knockdown? What's been your experience with them?

I've got a ballistic specialties in a .655 I would let go for $50 and a pure gold tempest 660 for $50 as well. $90 for both.