I have a number of blowers, 2 Echo 210's. 2 Stihl BG86 (one with a muffler mod), an Ego 650CFM and a Kobalt 80V. (mostly for keeping our hangars clean)
I like the EGO the best as it's smooth, powerful and easy, especially for short jobs. However, it only lasts 10-13minutes on "turbo" which is the only power that makes sense on that thing. The problem with the EGO is that my PA house had a fenced in yard and 200 foot driveway that needed attention every week. The battery could not finish the yard, (not to mention the driveway) got hot, and would not charge fast. It also lost some power at the battery drained. So the Echo 210 would come out and finish the job. BTW, the Echo runs for 45 mins on a tank.
The Muffler Modded BG86 has the highest velocity of the bunch, I keep that one at my FL home. It has the most practical power, as the high velocity will absolutely move wet yard debris.