Perhaps on paper. But being a global power gives the US a special relationship with friendly countries as well. The dependency on US military protection subverts the sovereignty of allied nations causing them to harmonise laws on intellectual property, drugs, share intelligence including information about businesses in competition with US ones amongst other things. It is a very advantageous situation for the USA and I think it is wrong to think the only point of being a global superpower is to keep the Russians and Chinese in line. It is as much about maintaining the Empire and keeping the client states in line. Hail Caeser!