Sure, fewer is better but too few and you start getting a lack of information.
If all you have are Rieekan Aces, that is all you know. You don't have the information to defer between a big ship and medium ship setup. This will impact the knowledge gained. Take DeMSU, this one is self explanatory but are they Raider or Gladiator?
That information matters. I am not looking for a detailed breakdown, just a few more clarifications where it is needed. Otherwise we will have too little information and will have to go sifting through the actual lists to get any usable information.