Hello -
I went and looked closer. The ContiProContact line of tires has slightly different tire patterns as a function of size. Here are my ContiProContancts when new as compared to the ProContact EcoPlus tires :
What you can see is that I only have two "middle treads
[ribs]", probably as a function of tire size. Tirerack is showing a photo of a larger size tire of that brand of tire.
I would make the claim that my old "standard-issue" ContiProContact treads are already pretty close to the EcoPlus treads.
CarloSW2