Please add more detail to your posts, or which term you are really talking about. For others: lots of common W:ET sense ahead, be free skim trough for incorrect wording.
Since I didn’t spam so much in this topic, I’ll give an explanation of what XP is, and what ranks are in the ET legacy:
“XP” (Or “eXperience Points”) is what you gather during one campaign. You get it for killing, doing objectives or being close enough to the battle. (Battle sense.) All of these points are stored in their appropriate category. For continuous killing, your “Light weapons” XP category would fill up, for blowing up objectives you’d get XP in “engineering”, etc.
Filling those categories unlocks weapons and increases your title based on your previous promotion. Titles in W:ET go from Private to General, or from Schutze to General for the german titles.
Default W:ET saved the XP categories and thus your titles for as long as one campaign.
All this categories can be summed up to get a total amount of earned XP. This total amount would result in a certain ranking in each level’s end screen, those with the most XP got on top. (Medics mostly got higher than engies because medics continuously get XP for reviving/healing.) Of course, this is a doubtfull ranking system, but it is one way of doing it. This ranking system does not equal one’s title, because you can only become “General” if you filled up all categories and thus played as all classes. Players playing as a medic for a whole campaign could thus have the highest amount of XP, but still be Captain whilst others could have promoted to Colonel. (Just do the math in a very long campaign.)
Enter “XP Save”. Hated by players from the ETPro crowd, loved by ETPub server admins and players. It saves all XP points in all categories, and you get them all back when joining the server. This also means you’ll fight with your extra weapons and advantages, which is about how BF did it. If you do some math again, you can clearly see that those playing the most have most of the benefits, apart from being trained. New players haven’t played, thus aren’t adapted to the server’s policies and got no special abilities on top of that.
A (possible) better way to make an “XP Save” system would be by saving the total amount of XP and/or one’s titles without the weapon unlocks. Improvements could be made to the XP gathering as well so that it’d take longer to promote to General.
The last option is what ET:QW’s ranking system should be about: a fingerprint of how much you have been playing recently, without influencing the game in any way. XP points stay for a campaign, but no longer than that to level the playing field at the start of a new campaign.
At this level, you can compare ranks because players will start from scratch on each new server. The only thing they do carry over is their title and personal skill, the latter being the one thing you can’t simulate by ranks, XP save or other mumbo jumbo.
So enjoy XP as long as you can on one server, but don’t see it as a goal: the main objective is to show you are better than your opponent and that you will prove it to him by fulfilling your objectives.
The only time you would look at ranks or XP is in bragging contests or when you are unsure whether a certain Anansi pilot is good enough to stay clear from the nearest forest.
Thanks to all reading this heap of text, you must be brave if you read it all.