From [url]http://www.percona.com/doc/percona-xtrabackup/2.1/installation/compiling_xtrabackup.html[/url] you can compile Xtrabackup against different versions of MySQL. Are there any functional differences where one has more features than another ?
Actually, xtrabackup version will be same, just base environment is gonna change. So you can not get functional difference related to Xtrabackup but yes, you can compile the same for different environments.
bit late on reply but thanks