These two trucks aren't even in the same ballpark. One is a smaller 1/10th scale and runs on 1 battery, one is a true 1/8th and runs on 2 batteries.
For a 1/10 the stampede 4x4 is a very capable fun truck, it definitely needs some upgrades, but then again, what RC doesn't?
The 1/8th Savage is a larger heavier duty truck. It can handle larger terrain and jumps, etc.
Between the two i would pick the savage hands down, like I said its not even a fair comparison. Its Bigger, Badder, Tougher, and just all around stronger well put together truck.