The Client and Services build can differ and still work as expected. It is best to keep them within the same minor build branch.
For example 220.127.116.114 for the client and 18.104.22.1681 are fine but 22.214.171.1244 and 126.96.36.1992 may not be. 6.4.1.x should be upgraded to a build within the 6.4.2.x range.
If you are in doubt on this, please contact support to verify that it is ok.