Looking for advice on a blueprint engine.

First off this is not a Mopar, but I was hoping the engine GURUS could help me decide on which engine to purchase. Both are in the same HP range, although the 396 does have a couple more points of compression, which may not use pump gas. Both are built from the same new casting 350 block, and both are in the same price and HP range.

I am ordering a long block because I already hve an ignition and pla on using the performer RPM Airgap manifold.

The one I am leaning towards is this one, it is a 350 stroked to 396 with 6.0" rods and a 4.0in" bore. Forged crank, rods, and pistons.

GM SB Compatible 396 c.i. Engine - 491 HP - Long Block

Or

This one which is also a 350 stroked to 400ci" with a 4.125' bore and a 3.75" stroke also using a forged crank, forged rods, and forged pistons.

GM SB Compatible 400 c.i. Engine - 500 HP - Long Block

I am leaning towards the 396 because of the 6" rods, however I have no clue why because I am dumb as a box of rocks on the math of what works or does not work.
I may have read somewhere or picked up from conversations that a 6" rod is preferred.

They should just make one with 6.123 rods and a 4.040 bore and that would be easy, lol.

Thanks in advance!