The SPS models are ADLs with a cheaper stock but as far as I know, the actions and barrels are one in the same. In this case, the SPS Varmint is the same as the 700P or any other of Big Greens varmint/heavy barrelled rifles except for that cheap stock it comes with. I could have gotten a 700P for the same price I'm paying when you add up the cost of the rifle and the HS stock, but I didn't have all 900 upfront and I didn't want the run of the mill black so I decided on going this route. And actually, going this route got me the new trigger which out of the box is very adequate for my needs.
Here's a review of the SpS-V that sheds some light on what it did before they removed the stock and popped an HS on...
remington 700 SPS Varmint
Out of the box it's very respectable, and honestly I'm already pleased with it's performance. Just holding it though, it just feels so cheap and just....wrong. I miss having a palm swell too