The kinds of differences that would matter to me are

vine length
days to maturity
size of fruit
shape of fruit
color of fruit
origin - breeder
year developed
taste - sweet, slightly sweet or what ever
texture - stringy or smooth
ability to handle weather extremes (heat, drought)

I really like buttercup, but the buttercup I grew last year was a wimpy vine. Not long or strong. The kinds of squash that do well here are the long vines with larger leaves. It gets very hot here.

I was considering planting something that would taste like a buttercup but be a more vigorous vine.

I was thinking one or more of the following

Green Hokkaido

warren turban

Whangaparoa Crown

yocahama - this is a moschata so I was wondering if it tasted like a butternut. I hate butternut squash

pumpkin jap

marina di chioggia

Argentine primitive pumpkin - supposed to be ancestor of the buttercups.

jarrahdale

Anyone have ideas of a vinier buttercup type squash?