They're not really that senstive... they're just different. What these batteries need is constant voltage charging. Apply 14.8V, and let the amps do whatever they will. They will take crazy amperage at the bottom of a charge, then the amperage tapers off as the charge rises.
Luckily, that's pretty much how alternators work.
The problem is most chargers will try to push in whatever amperage you have selected. 40Amps is easy for a 2150 at the bottom of the charge. But when they get full, the charger is still trying to push 40Amp, resulting in a high voltage, which these just can't take for some reason. I think normal batteries can take 15.9V at the top because they have such high internal resistance that they aren't letting many amps through at 15.9V.
The Odyssey specific chargers are manufactured by Schumacher, but they aren't standard chargers. They are custom programmed for Odyssey to be constant voltage.