Blake is nothing if not patient. His books are just waiting there, perhaps with a slightly musty odor, on the shelves of a library somewhere, to be eventually discovered by desperate golf explorers who've tried everything--suddenly, they find: golf gold. I've read Trevino's book and referred to it many times--great graphics and simple language though he's not necessarily easier to follow than Blake, IMO. Improvements could be made in their books--the shame is that they are out of print.
The main similarity I see between the swings of the two men is the open stance and use of the legs for energy. The main difference is that in the latter part of his downswing, Trevino said he accelerated the lead arm. He was apparently emulating Hogan in trying to coordinate energy from the lower and upper body, 'adding' the two, if you will. Blake's swing was a 'pure drag', ie, legs were the (claimed) sole source of energy, no contribution by upper body.
Blake's main analogy in GtTB to his swing is skipping a stone over water. He thought this motion to be closest analogy of any athletic move. However, it's also a one-armed motion--maybe he should have talked about cricket--at least cricket batting is two handed.
I don't find skipping a stone analogous to the reflex swing--for me it's more like Hogan's idea of coordinating lower and upper body energy. When I skip a stone I definitely use my legs but as my throwing arm is coming through, I 'whip' it to get that extra bit of energy from arm and shoulder. Blake, though, found skipping a stone to be much like his swing. SD