A lo-pro uses pursuit bars and (usually, but not necessarily) a sloping top tube and/or small front wheel to replicate the hand position of riding on the drops of a normal road/track bike
A faux pro uses pursuit bars and a sloping top tube to replicate the hand position of riding on the brake hoods of a normal road bike. Since the sloping top tube is rendered completely unnecessary since about 1985 by the availability of long seat posts, it is purely a hipster affectation (see Cinelli Mash)
A lo-pro uses pursuit bars and (usually, but not necessarily) a sloping top tube and/or small front wheel to replicate the hand position of riding on the drops of a normal road/track bike
A faux pro uses pursuit bars and a sloping top tube to replicate the hand position of riding on the brake hoods of a normal road bike. Since the sloping top tube is rendered completely unnecessary since about 1985 by the availability of long seat posts, it is purely a hipster affectation (see Cinelli Mash)