It's both. Obviously, electric leafblowers will be quieter than 2-stroke leafblowers, but that doesn't make them quiet in any way. Just like electric cars are still loud at high speed and freeways will always be loud, because wind and tires make way more noise than any normal car engine crusing at 2000 rpm.

It's not the same, because cars have mufflers, and are MUCH quieter than your leaf blower during operation. Of course you're not going to eliminate all noise, but they are significantly reduced without an engine. Can't really compare a freeway to your neighborhood lawn care.