The Savage Flux and the Summit are really to far apart to compare, The Savage is Brushless (which mean gobs more power), more money ($480 vs $610) smaller wheelbase and tire (4.3" to 7.0"tire) no electric lockers, no dual range transmission, and lastly and what makes the summit so much fun it's not WATER PROOF

I have already run my Summit through the pond numerous times without fail. If you do that once with a brushless it's toast. I love the fact that I can go play wet/dry and pressure wash my rig when I'm done and hit it with WD-40 and bring it in the house all clean. But beleive me I will have another brushless rig soon and it will be between the Revo and the Savage.