Here's just a few thoughts as to why the Combat Digi-Q is about INFINITELY better than a lot of the clones out there...
1. knock-offs have no other details except for being a 'Combat Hero' (like the one you linked Stider)...The Combat-Qs are super-detailed replicas of actual tanks.
2. Combat-Q tanks don't just have 'lasertag' capabilities, they have modes of combat (like team battle) and the Tank and Controller actually communicate back and forth to keep track of Team settings and amounts of hits taken (as you take hits, your tank performance degrades, just as if you were in actual battle)
3. Combat-Q tanks have changeable IDs (the radio clones are 1 frequency only).
4. When firing, the Combat-Q tanks actually recoil back. And when 'hit' there's a flashing red light underneath and the tank spins about 3 times.