Google's is worse because it takes all rights to use your work however it likes, and then states in its privacy policy that it won't use it for anything other than to provide the service. But if it likes, it can amend the privacy policy in the future to remove or modify that limitation. So you have to trust Google, which may be fine now, but what about in 20 years? They have rights to your work forever.
Other providers clearly state that they are only taking rights to your work for the purpose of providing the service, right in the ToS. IANAL, but this seems important.
Other providers clearly state that they are only taking rights to your work for the purpose of providing the service, right in the ToS. IANAL, but this seems important.