How does a solid roller cam act vs solid flat tappet

Things like rod ratios are only to be worry about in a highly competitive racing like Nascar, or people with deep pockets for the rest of us cylinder heads is where it's for bang for the $$$$. Saying that for me I would probably never build a 4" stroke small block I see why people do, But there's tons of 383,400,440 out there with displacement and good bore rod and stroke ratio's, it's one of the advantages already built into Chrysler engine's don't see no reason to build it out of them and if I want a short rod engine I'd build a stroker 440.