K-Swiss Blade Foot vs. Altra Instinct/Intuition Shoes

On the surface both of these shoes look similar, their weights  8.8 oz. on the Altra and 9.2 on the K-Swiss in size 10 Men's.   The Altra comes with two different foot-bed inserts on for Support and one for Strengthening.  They increase the stack height from 16mm, 19 and 21 respectfully.  The K-Swiss  has a stack height of 20mm, with 8mm of that for cushioning.  Stack height = The total thickness of the shoe/the distance between the foot and the ground.

The midsole of the K-Swiss uses Superfoam, an energy return foam that resists compression thus lasting longer. It also has K-EVA cushioning, a special K-Swiss EVA to provide maximized cushioning and enhanced durability. Additionally, the midsole is constructed of GuideGlide, a unique midsole construction that centers the foot from heel-to-toe ensuring a more comfortable and stable ride. Altra has Men's and Women's specific foot shaped lasts, and NRS: Natural Ride System.

The uppers are made of a lightweight air mesh on the K-Swiss and the Altra is Quick dry air mesh upper with minimal seams 

Both shoes use the term zero in their descriptions, Zero Drop verses Zero Heel Lift (Altra trade marked their name).  All this means the same thing, the no difference in height from heel to forefoot.  K-Swiss advertising says their shoe is not revolutionary, but Altra has stated that their shoe is barefoot shaped and makes claims that it helps with posture, and back alignment. The K-Swiss has less barefoot width in the forefoot to toe-box. Altra states that runners can maintain proper running technique and reduce joint impact while freeing their toes to help alleviate foot pain. 

For the road test, since I have a narrow forefoot, both shoes felt comfortable.  The difference comes in road response. The Altra is stiffer with less flex than the K-Swiss.  For most runners moving from a conventional shoe, the Altra is great choice.  For those who run mid-foot already and want less between then and the ground,  then the K-Swiss is the right shoe.