How does a 360 408 stroker work?

I picked up my 408 Scat stroker kit for around $1900 from summit. Came with Cast crack, Forged dish pistons.

I am going to go with this FORGED Scat kit from Summit for $1713 and let my machinist balance it for me.

Scat forged stroker kit

Why was your CAST kit $200 more? My machinist charges $200 to balance the assembly. So for basically the same price, I have a forged rotating assembly vs. a cast one.