Not really. Conquest is a bit slower than Odyssey, but it's stronger than it. Due to a combination of ballistic mounts and high flux dissipation it's the ship with the best offensive potential in the game, even if it doesn't have the alpha strike of a quadruple tachyon lance paragon.
That's.... putting it very lightly.
but it's stronger than it.
Only if you want to fight with both sides of the Conquest at the same time.
But then, considering the ship has the smallest shield with the worst flux/damage ratio and meh armor, you really want it to be surrounded from both sides?
Secondly it can't actually maintain the flux dissipation for both sides firing for any reasonable amount of time.
Lastly, it got better flux capacity and dissipation but it's offset with literally smallest and shittiest shield, so it's not like the extra capacity and dissipation is free.
In all other times, Oddysey has similar firepower and some would argue better weapons, if you are in any range to get hit and you want to use shields, oddysey is far better as both the size of the shield is bigger and the flux/damage is better.
Onslaught has better/more firepower for a single target(single side) while having good armor.
Paragon has better single target fire power as well with longer range, better shields.
In reality Conquest is a lovable meme that just falls flat when you compare it to other capitals. It's supposed to be a agile glass cannon, but the Odyssey does it better. It has terrible shields so it needs to outrange and kite, but Paragon has best range and more firepower, with a better shield to boot.
Ironically, unlike Onslaught that greatly would benefit from maneuvering thrusters helping it have a good turn rate and compensate for it's weakness and thus be a boon. The Conquest uses manuvering thrusters just to offset it's lack luster. I could go on and in actual detail, but really who cares.
As somebody else put it, Conquest is the most common capital ship thanks for Persean and Sindra, so in essence, Conquest is the "pirate faction" of capital ships, the rundown ship you are supposed to bully through out the game.