On my lvl 54 hunter I was wondering if it would be best to get a pet after going to outlands, or if I should get one now so it would have the most training points.
All pets of a family are the same, except for the usually rare ones with "caster" stats. It doesn't matter if they came from Outland or Azeroth, unless you want one of a specific color or starting level.
http://petopia.brashendeavors.net has all the answers.
Pets of the same level and type have identical stats. The only advantage is looks and that Ravagers can't be acquired in Azeroth (excepting Azuremyst/Bloodmyst). Indeed, lots of Hunters bemoan the lack of high-level Boars!