The four aspects in which ureotelism differs from ureotelism are:
(a) Uricotelism is excretion of uric acid whereas ureotelism is excretion of urea.
(b) Uric acid is non-toxic whereas urea is less toxic.
(c) Uric acid is insoluble in water whereas urea is soluble in water.
(d) Uric acid can be excreted out in the form of crystals
but urea does not form crystals.