I believe the use cases are different, which drives a difference in at least the user experience. AeroFS is designed for business use, so we strive to balance simplicity in UI/UX with security/privacy while trying to avoid things like side-channel sharing of secrets. We focus on functionality like managing your team, the ability to remotely wipe devices, control sharing within your organization, and so on, while providing the "Dropbox experience" that end users within the organization ask for, and without us storing any of the data itself.
I agree that the main gripe with AeroFS that people have voiced in this thread is certainly valid. AeroFS _did_ slow down in performance for some users recently. We actually just released a version today that addresses this bug (0.4.181 - see http://ae.ro/Ln2YJJ for the release notes, but it specifically had to do with the way we were initializing our jingle library), and in our own internal tests the performance has improved dramatically.
I agree that the main gripe with AeroFS that people have voiced in this thread is certainly valid. AeroFS _did_ slow down in performance for some users recently. We actually just released a version today that addresses this bug (0.4.181 - see http://ae.ro/Ln2YJJ for the release notes, but it specifically had to do with the way we were initializing our jingle library), and in our own internal tests the performance has improved dramatically.