Hyd Roller vs Hyd Flat tappet on SM heads

I almost always throw the springs away and use quality spring pressures for the cam I’m using. I don’t always know where the springs come from on complete heads.

The spring height recommendation is always followed. I don’t care how the head came or with what springs are on it. It all gets adjusted.

Don’t worry about the spring height they state. Both listings are rather tall compared to stock.