RE: Savage 25 or Savage SS
The Savage 25 rtr is ready to run out of the box only batterys,fuel and run in are required. The SS is a kit version of the 25 with a different exhuast which is what makes it faster. The SS has a pull starter and the 25 is roto-start equipped. The SS stands for Super Sport and is designed for more advanced R/c members who already have radio gear as the SS does not include radio gear, it is conciderably cheaper than the RTR. If you are new to r/c, i would suggest gettin the 25 as the difference in perfomance is nothing major and can easily be brought up to the same as the SS with about £30 ($54) of mods.
Hope this helps
Joe (savage25er)