The best replacement for ubuntu 13.10 is 12.04.

The best alternatives to ubuntu 13.10 are rated as following:
★★★★★  12.04
★★★★  windows 8.1
★★★  mint 16
★★★  fedora 20
★★  ubuntu 13.10
★  elementary os
★  mac os x
  linux mint 16
  opensuse 13.1
  debian 7

Your alternative for ubuntu 13.10 is not listed? Suggest!
Speaking about ubuntu 13.10, one probably shouldn't forget about gnome 3.10.

Other search terms related to ubuntu 13.10 and their ratings are:
★★★★★ gnome 3.10
You have in mind a companion for ubuntu 13.10 and it is not yet here? Propose!



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ubuntu 13.10
12.04
windows 8.1