One is oval, with light yellow, smooth skin, and yellow flesh.
It is meant for processing into potato chips (aka crisps in the UK), for processing into French Fries (aka chips in the UK) and as all-purpose for direct to consumer sales.
Sierra Potatoes were developed by the Plant Breeding International Cambridge Plc in Cambridge, England in 1979 from a cross between two potatoes referred to as “LR3” and “D42-8.”
Another potato named Sierra was developed at the University of California, released 1986, from a cross between Targhee potatoes and a potato referred to as “A66110-39.” During development, this potato was referred to as “AD7377-1.” It is not grown commercially.
This second Sierra is oblong, with russetted skin, and is marketed as all-purpose for direct to consumer sales. High yields.