I have the S1000, but not the successor. I have handled one, though. The improvements, if you can call them that, which I have seen are apparently of a cosmetic nature, only. Thin tubed, full-barrel shrouds that imitate bull barrels are not mechanically superior to the slimmer yet perfectly adequate barrel on the S1000. The stocks are about even, depending upon your preferences. If anything, I would say that the new guns have a few more parts that are apt to wear more than the older models, especially that barrel shroud which looks like it would dent/scratch fairly easily. Sometimes manufacturers should adhere to the KISS principle - Keep It Simple, Stupid!
This for Ken: Are all modern, mass-produced things inferior to their predecessors? Think back to the cars of the 60's and 70's. While Mustangs and GTO's were a hoot, they required a lot more work to keep them running than today's cars. There's not one vehicle from that time period that you could run for ten years with nothing more than tune-ups and oil changes, if the body didn't rot off first. Ditto computers. Same for contact lenses. Tomorrow I'm gong to pick up a couple of ultra-light rod/reel fishing combos for the kids to use this spring. My local Sports Authority has some inexpensive sets on sale for all of $7 after discounts. They are, in almost every respect, better than the much more expensive set I use which is twenty years old. It all depends on the merchandise.
What, me worry???