On Friday I explained why Terminal Reality decided to focus on PlayStation 3 from the get go, but that’s not the approach for most studios. For many, Xbox 360 remains the lead platform.

Last week, I sat down to see a short demo of Disney’s upcoming off-road “SSX”-meets-ATV racing title “Pure.” Between loading screens, I probed “Pure” game director Jason Avent, part of Disney’s Blackrock Studio in the UK, about his team’s development approach.

Blackrock has always started development on Xbox 360. That approach wasn’t altered for “Pure,” and Avent’s team haven’t had any regrets.

“We started on 360 because we did “MotoGP ‘06″ and “MotoGP ‘07″ on 360 before,” Avent explained . “But then we changed over to put more of the team on PlayStation 3 in about November [of last year]. We had feature parity in about January and now we have frame rate parity. Effective, there is no lead format.”

There’s no lead format for the new game anymore, but “Pure” did start life on Xbox 360. “Pure” is Blackrock’s first racer to appear simultaneously on Xbox 360 and PS3. As “Pure” finishes out development, I wondered if Avent will do it differently the next time.

“I don’t know if [starting on PS3 is] easier,” he said. “I think that because of the way the PS3 is architectured, it’s more specialist. There would be advantages in making it the lead platform so that you do stuff first on PS3, so that you tailor yourself to it. But you have to tailor it to 360 as well in order to get the most out of it.”

Whereas other studios have openly groaned about their 360-to-PS3 porting issues, Avent mostly shrugs. Part of that stems from the way Blackrock’s teams operate, he said. They’re competitive. The PS3 programming specialists at Blackrock want their version to be as good, if not better, than the Xbox 360 version. They’re out to please themselves as much as gamer.

And that, readers, is how Blackrock is making sure their games look the same across each platform.

Check back later today for our thoughts of the very promising looking “Pure.”