How is he a better Scizor counter? Zapdos still KOs with Heat Wave, and has similar resistance to it's attacks. The only thing Moltres has is that it retains resistance to U-turn while Roosting. Again, as I keep repeating, actually tell us what makes it stand out rather than just saying it's good. Give us calculations, a war story, anything.
Raikou and Jolteon fill entirely different roles, and can't eve be compared in the slightest. All they have in common is being electric types on the special side of the attack spectrum. For someone asking for tolerance of less-than-ideal strategies, you're quick to call other things inferior.
The 4x resistance to U-Turn helps, a lot, along with the better defense(90 > 85). Moltres is 100% a better Scizor counter when rocks aren't up. I thought the OP addressed how Moltres is superior as a Scizor counter than Zapdos already? Higher defense and half the damage that Zapdos takes from U-Turn. Does it really take calculations to prove to you that a 4x resisted move with higher defense is going to do less than that same move, yet 2x resisted againsted a pokemon with less defense?
Raikou and Jolteon... don't exactly perform entirely different roles and they can be compared. When making a team, you might ask yourself, who should I use? Jirachi, or Metagross? Typically, you will find yourself only using one of them, simply because they have redundant typing and share common weaknesses. The same thing holds true for Jolteon or Raikou-both of them are a ground weakness. Sure, Raikou can beat WishBliss, however, more and more Blissey are reverting back to ST and a Calm nature, for SubCM Latias.
Don't try to make me sound like a hypocrite, Moltres fits into many OU teams currently(basically any team with Salamence can use a spinner), and no other pokemon fills the niche of countering MixApe, Heatran, Lucario, and Scizor. Meanwhile, Raikou must compete with SubCM Jirachi and SubCM Latias, who are superior sweepers, or Jolteon, who is more appropriate for a choice item given its huge speed and Baton Pass. Many teams love the ability to outspeed Adamant Gyarados after a DD, where a Raikou would simply die to Earthquake. There are so many distinct advantages that Jolteon has over Raikou, meanwhile, it is evident, that once you can get rid of Stealth Rock, Moltres is more useful(in most cases) than Zapdos, since many of the teams I have seen Zapdos on also run CeleTran, meaning waters aren't an issue anyways.
EDIT: What are the calcs for Naive Heatran, since that is typically the nature found on him iirc.