First, it is Envy, not "Envoy"...
The Pavilion is a 15.6" laptop while the Envy is a 17.3" and it has a dedicated nVidia 940m graphics chip that you will not be using. I suppose it boils down to which size screen do you prefer and if the weight matters.
Not sure where you are looking to buy the laptops, but the base model of the 15.6" Pavilion is pretty inexpensive at HP.com with a starting price of $440. It has a Core i5-6200u, 1366x768 resolution screen, 6GB of RAM, and a 1TB hard drive...