This is the VPS cloud VPS technology which can be said recently. So the difference is the type of VPS combine several servers into one unit to handle many VPS. Like the picture above, if one of the servers damaged/overload it will not affect the performance of other customers VPS. Because already in the handle by other servers, so this server will be mutually to cover service. So for example there is one of the VPS that is experiencing a surge in traffic and reach the limit of the resources already given or exposed network DOS flooding so it won't affect the other VPS, Yes only the VPS are inaccessible because of reaching the limit.
Server SSH
Unlimited Host Asian and America. Server Port 443 and server 80, 143
version SSH Dropbear / Openssh: