The primary difference being that kimsufi has basically no support, you're wholly responsible for whatever OS you're running on the box. The only support is 'wipe and start over'. If you're confident and OK with that it's a lower cost option.
To be honest, that's also the same support level as the higher plans like SoYouStart and OVH. They don't manage or administrate your servers for you. You need knowledge. The good news is: it doesn't take much to be able to manage everything on your own.
So very true and I doubt if ANY service with such low costs would provide any support beyond hardware/network failure. However, speaking for myself, once I have the trusty ol' CentOS 6.7 and an ssh login, Barbara is my aunt, so this works for me. :-)
It's fine as long as one remembers the mantra: backups, backups, backups, backups.