EDIT: Deck Knight explained why we would need to give a Steel-type CAP10 an ability or second type that negates one of its weaknesses. However, the reasoning he used cannot be applied to the idea that an Electric-type CAP10 would have to have Levitate. Jolteon and Electivire remain OU in spite of their weakness to Earthquake and neither of them run Magnet Rise.
That is probably because, shocking though it may seem, neither Electivire nor Jolteon are defensive nor walls of any description, nor are really able to counter... anything.
I really cannot see the charm the Fighting-type brings over Electric, if I am honest, and some of the reasons given here on that point are bordering on ridiculous. What on earth are people talking about, stating that certain weaknesses are 'irrelevant'? We are supposed to be creating a Pokemon with defensive versatility, not yet another Fighting-type wall of dubious interest. To me it seems like the majority of people who have voted Fighting are simply unwilling to accept that a weakness is a weakness, no matter to what type.
There's this rubbish about Stealth Rock and Pursuit, too. OK, so it resists Rock and Dark, but a neutrality to them isn't exactly crippling, especially if CAP10 is getting high defensive stats to go with it. If anything I would say that Electric-type has an advantage even here, regardless of the Fighting-type's excellence, since it has a much bigger case going for it for the ability Levitate, which will give it immunity to Spikes and Toxic Spikes - which really is quite a big deal. And these supposedly amazing resistances on the part of Fighting - what do they really mean? All they have going for them, at all, is really being able to beat Tyranitar and Scizor more effectively - and arguably Electric does better against sweeper Scizor regardless. Oh, and Stealth Rock/Pursuit resistance. Actually, I'll go further than that:
Sum total of OU Pokemon whose common STAB Electric resists:
Scizor, Jirachi, Metagross, Magnezone, Jolteon, Electivire, Zapdos, Forretress, Bronzong, Togekiss, Skarmory, Gyarados.
Sum total of OU Pokemon whose common STAB Fighting resists:
Scizor, Heracross, Tyranitar, Weavile, Aerodactyl.
I have a very worrying feeling that here the community wants, above all, is simply yet another bog-standard defensive Pokemon, and more than that - in all honesty, I get the feeling from a lot of people here that the biggest reason they chose Fighting for the primary typing was in hope of getting yet another ridiculously hard-hitting offensive behemoth. If the finished product ends up unable to defend to an adequate extent, it doesn't matter how hard CAP10 can hit its counters, the Project will have failed, and we won't learn anything from the experience. Although this is only my personal view, and has nothing to do with the official process, I believe that it is absolutely first priority to learn more about the way the metagame works than to try and make the Pokemon itself 'successful', and I fervently believe that the lesser-explored Electric allows us to do that more effectively.
In summary:
- Electric has fewer weaknesses than Fighting and is MUCH less likely to encourage voter apathy with regards to weaknesses (ie. sloppy ignorance effect), and has a stronger case going for it with regards to Levitate, allowing it to dodge Spikes and Toxic Spikes.
- Electric arguably has better resistances than Fighting, as it allows it to take on a greater number of Pokemon on resistances alone.
- Electric has a better collection of STAB moves than Fighting, and gets a lot better neutral coverage as a STAB move.
- Electric has a much higher number of types that it can bond well with than Fighting. On Fighting's part, there are only three types it can bond with to get only two weaknesses. Psychic/Fighting is slightly self-defeating as it gets rid of Dark's supposed advantages in resistance to Pursuit and Bug, while not resolving the Flying-type weakness and making the Ghost problem even worse. Dark/Fighting is horrible on a defensive Pokemon, and simply screams 'yay fanboy Dark/Fighting sweeper!'. Not only that, but it also adds the problem of a large Fighting-type weakness, which is even worse than Electric's Ground weakness. So what is this final type that bonds well with Fighting? That's right. Electric/Fighting. Oh the irony.
Voting
Electric again.