Interesting comparison, but very different application of a second bet spread. Richard Reid, if I remember correctly was purely for bet camouflage purposes. He alternated every round between the 2 different bet spreads. And a second spread would work well for that purpose but at HUGE resulting variance. The easy example would be what if the player did well at at the rounds played at the smaller spread, but lost most of the rounds at the larger spread? Result would be a rather large session loss, on what should have been about a 50/50 session. I am not opposed to inviting more variance, but there has to be a better reason than just general betting camouflage.
My own application of a second bet spread kicks in after showing the full cycle of the first bets spread. ideally, you would want the small wager of the second spread to be somewhat close to the max bet of the first spread, so there isn't much drop off in wager after you have shown your initial Max bet. That drop back to a smaller wager is the biggest "tell" of a card counter, so that is what I am trying to avoid.
The example would be initial spread of say $50-$300. After showing max bet of $300, at the next shuffle you implement the second spread of let's say $200-$800, resulting in very little drop off and avoiding that huge "tell". Anyone watching would conclude that such a player is NOT a card counter at that point. Just a player varying wagers. So, the benefit would be a second full cycle at a table that otherwise you would exit after one cycle. And for EV purposes, you just average the two spreads together.
This application would also have some of the same benefit of Reid's alternating hands spread, which is bet cover or camouflage, but that is not the primary benefit. The primary benefit is twice the play (2 cycles) at one table.