I currently own the Axis and Encounter pants. I ran the Axis pant in the past and I will be running the Encounters this year. I don't have the Encounter jacket yet so I will talk about the pants.
The pants have similar wind resistance with a slight edge to the Encounter mainly because the pockets on the Axis are basically vented with their mesh liner. If the Axis pockets are zippered opened some wind will cut through.
Slight edge in warmth to the Encounter. I had two days in the stand with them. Both days were overcast, upper 40's, and a little breezy, 15mph. I layered 145 merino base underneath and was comfortable. I have other base/midlayer options I will he testing as the temperatures drop.
The Encounter material is definitely more quiet but probably not as big of deal for pants as it would be for jackets. Thinking drawing a bow back.
The waterproof panels on the Axis are a plus for say sitting on the ground but probably not so much for in the saddle.
The front cargo pockets on the Encounter are much better for saddle or treestand hunting. They are more accessible and easier to get in and out of. They have a much larger capacity as well. Each pant leg has two cargo pockets on the thigh area stacked on top of each other. One with a side zip and one with a top zip. No problem fitting calls, your phone, gloves, a beanie, and other accessories in them. They did a good job designing the front pockets. There's also the 2 traditional pockets near the hip area. My only gripe is there are no rear pockets. My entire life I've carried a wallet in my back pocket so it's just odd for me. Fortunately there's plenty of room in the front cargo pockets to carry my wallet.