I've owned, hunted with and/or shot several Stevens rifles in the last year or so. First, they are EXACTLY a Savage, the parts are fully interchangable, so there's no need to be suspect of what you're getting. Second, they are a super idea, they are budget priced, with features and accuracy that is hard to beat at any price. The 270, 7MM-08 and a .260 I made out of a .243, by purchasing a Savage barrel online, all shot super and I would put them up against any factory gun made. My shooting pal bought a 25-06 and a 30-06, and they both were flawless in the accuracy department. There's just no downside to these guns.
I must admit to not ever having shot the 710. I read quite a bit about them and have looked them over, and they just don't do it for me. I probably won't own one, just from the buzz about them and my cursory look at them.
The Savage is a proven design, that is economical to manufacture, but creates a super bolt gun that never seems to let me down. The Stevens only has a different name on the bolt.