STO stands out, you shouldn't even be comparing to ICOs. STO has very strong backings with regards project and product, well known team too, unlike some ICOs which end up to be scam. About the bitbond you mentioned, I'm yet to hear about it.
Bitbond is a project that is running and making a concept of fundraising with the STO model, if we compare between STO and ICO it certainly makes a difference even though basically both are fundraising work for the project.