There are so many lines and subvariations in both openings that is impossible to characterize the one positional and the other aggressive. For example the Queens gambit with Nf3 can give a lot of dynamic positions when at the same time black can play a solid system system against the London neutralizing any aggressiveness.
In my point of view White has more chances to play dynamic with the Queens gambit than with the London .
What do you guys think about these openings? I think the queen's gambit is more solid and positional, while the London system is more aggressive.