Having had both, we like the electric better. It's so simple to just push the button. If he wind kicks up, both need to be pulled in anyway. When it's raining, both need to be tilted, although some are built to self tilt if they begin to pool with water. Our current one (electric) is self tipping. It works great, but once the water is dumped, it springs back into place with a ker-thump. We found, when raining, just keep it pulled in, unless we are actually sitting under it. Then it can be anchored into a tilt position.
However, the manual one was easier to reach to clean. I would pull the bottom of the feet from the wall, slide them under the camper, arms and all, and the entire awning would hang straight down on the side of the camper. Then washing the top side was just like washing the side of the camper. I do miss that easy access to the top side on the manual, but do appreciate the easy in-and-out of the electric.
Both have their advantages. Both have their disadvantages. It really is a matter of what you want to do.