The difference is already in the basic (white) pawn structures.
English: c4
"White Hedgehog": a3, b3, d3, e3
Reversed QID: b3, e3 + Nf3
Réti: Nf3 doesn't change the pawn structure and appears in the great majority of openings. 
English, Reti, White Hedgehog, Reversed Queens Indian whats the diff?
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As the title states, I know the technical definitions, but I guess what I am asking are these all just transpositional lines, depending on blacks reply? (i.e. After the Reti, 1. Nf3 d5 2. c5 dc 3. e3, If I intend on developing the bishop to b2 isnt that a reversed QI?)
Sorry just confused, the lines seem to split then come back together.