That is a very valid question - why not join [LN] or 5th - they are the same at first glance right?
First of all I wouldn't say better - each to his own. Every single Disco player has their metric of relative "quality" and what is "better", mostly based on what they enjoy doing - and we very much respect the other factions and their focus. And it is rather different from ours - and seems to have attracted different kinds of players too.
The main focus of 46th has been on in-game mass patrolling rather than reactionary PvP focus or forum based or static in-game roleplay (even thought plenty of those are done too). RP missions to various places, excursions to e.g. Kansas, Vespucci (we will try to get the Zoi added to official ID purely to get a few raids going here and there), mini-events (OS&C convention, Light fighter race on live server, NU speculation excursion and many many other).
I think this + willingness to work and put a lot of effort into including never players is why the faction has found a long-term niche within Liberty, and why when it will be official there isn't too much worry about overlap.