Since the Landreth is supposedly identical to the 2000 series minus the dual density, why is it recommended for underpronating or over-supinating runners? I've read that the Trusstic System on the 2000 series is softer laterally. If this is the case on the Landreth, then it wouldn't be ideal for an underpronator or oversupinator. Also, I assume the shape of a shoe is made to fit a foot type. Obviously, a flatter footed runner for whom the 2000 series is designed wouldn't have the same shape as a high arched runner for whom the Landreth is marketed.
Can anybody explain why the Landreth is a top choice for its intended market? Or, is Asics trying to squeeze an extra buck out of an existing shoe? It seems to me that a shoe should be designed in its entirety for a specific biomechanical purpose.
Thanks!