We can find info on BC it depends on what you want. Finding solid info on the metabolic rate of BC vs CC will be not so easy. I will look. What is the exact context of the question ? BC are not native to ponds/still water and CC are more so. They have adapted over eons to their primary environment. BC are more riverine so they tend to eat more pelagic fish first like shads , sand bass ,etc.
Lots at Fishbase - take a look.
BC -http://fishbase.org/Summary/SpeciesSummary.php?ID=3019&AT=blue+catfish
Biology
Inhabits deep water of impoundments and main channels and backwaters of medium to large rivers, over mud, sand and gravel (Ref. 5723). Feeds on small aquatic invertebrates, clams and fishes (Ref. 93252). Prefers clear, strongly flowing water. Marketed fresh and frozen. Eaten steamed, fried, broiled, microwaved and baked (Ref. 9988).
Distribution
North America: USA (Mobile and Mississippi basins; and Texas coastal drainages between Mississippi and Río Grande basins) and Mexico (Río Bravo (Grande) and Soto La Marina basins).
CC -
http://fishbase.org/Summary/SpeciesSummary.php?ID=290&AT=channel+catfishDistribution
North America: Central drainages of the United States to southern Canada and northern Mexico.
Biology
Adults inhabit rivers and streams and prefer clean, well oxygenated water (Ref. 9988), but also in ponds and reservoirs (Ref. 10294, 44091). They feed primarily on small fish, crustaceans (e.g. crayfish), clams and snails; also feed on aquatic insects and small mammals (Ref. 9669, 10294, 44091). Marketed fresh, smoked and frozen; eaten steamed, fried, broiled, boiled, microwaved and baked (Ref. 9988). Albino form common in the aquarium trade (Ref. 13371).
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