I think the second shock is linked to the top of the first shock and when that bottoms out, the second shock will move. Basically two shocks for more travel . . . I think
well all of the baov r doushes i think its called a prototype not going to be produced, the karpeil team r just showing off there masterful enigering skill to but everone behind them...OUT
the second shop is for bottom out resistance, so after blowing through the stroke of the first one, you don't bottom harshly. the DHX will likely be set quite soft and the RP23 rather stiff, to make it super plush but not about to bottom.
look at the 2 stage bikes.