Nutritional difference between rats and mice?

[BaierBalls]

Obviously an adult rat has more nutrition than an adult mouse does, simply due to being much larger. But is there any information on nutritional differences, or lack there of, between mice and equally sized small rats/rat pups for smaller ball pythons?

[2kdime]

Bigger is not always better

Here

http://www.rodentpro.com/qpage_articles_03.asp