UPDATE 2-Medvedev vows new tone to policy after Putin

(Recasts, adds more Medvedev comments, details)

By Guy Faulconbridge

MOSCOW, July 3 (Reuters) - Dmitry Medvedev said on Thursday his presidency would have a different tone from his predecessor and mentor Vladimir Putin's and hinted the Kremlin might consider easing its complete dominance over domestic politics.

"The aims of Russia's development are not changing -- we want to create a developed country with a good, strong economy," Medvedev said in an interview with media outlets from Group of Eight countries before a G8 summit in Japan next week.

"As to nuances, accents, then they of course change," he said in the interview, a transcript of which was published on the Kremlin's Internet site www.kremlin.ru. "The accents of internal and external policies will of course change."

Investors in Russia's booming economy are watching for clues as to how Medvedev will mould his presidency and how he will work with Putin, 55, who has retained significant influence as prime minister.

Medvedev said he favoured more political competition, a hint the Kremlin may consider easing its dominance over the political system established under Putin, a former KGB spy.

Market reformers, including former electricity boss Anatoly Chubais, have called for more political competition, saying the country will fall into Soviet-style stagnation without it.

But Medvedev, a 42-year-old former corporate lawyer, said any competition must be "reasonable" and warned that turning Russia into a parliamentary democracy -- and so weakening presidential powers -- would be dangerous.