rvm list known differs between develop and production

I was planing to upgrade my ruby version for a project. On 1.9.3 so was thinking it was good idea to do in steps. First step would be 2.0.0, I run rvm list known and get this

...
[ruby-]1.9.3[-p551]
[ruby-]2.0.0[-p648]
[ruby-]2.1[.1 
...

But when I run the same command on my production server I get

[ruby-]1.9.2[-p330]
[ruby-]1.9.3[-p547]
[ruby-]2.0.0-p481
[ruby-]2.0.0[-p576]
[ruby-]2.1.2

Why do these list differs ? Seems like it would be a good idea to use the same version on both dev and prod