All base line weapons are simular as they are in fact in the series. No one race has a distinct weapons advantage over the other. Howeve each race has special attributes that they may only share with one or two other races.
The Klingons and Romulans have cloaking technology.
The Federation has more ships, better resource gain ability and better sensors.
The Cardassians have better planet damaging weapons, and the Ferengi ships cost less. The Tholians have the best armor, and the breen share their cost for ships between org and mineral. The borg have a superior mount, and the largest ships, while the Pirate races have the best capture technology.
Star Trek is about ideals, tactics, and strategies. When playing the mod keep in mind the fundamentals of Star Trek in that uber super weapons held by one race simply do not exist.
I have received many email on this and not all of them have been kind. I will tell you what I tell them, if you want to play as a super race, mod the mod yourself and make it so.
If you want the Federation to have the best weapons, change them. They are all listed in the files and can easily be modded.