Ova'LEK is the best of the inexpensive ships in terms of their stats. Among the shortcomings, I can note the absence of built-in modules (almost none of the ships have really good ones, however) and low energy production (overlapped by a high maximum of energy, due to which the core capacitors will work very well for this ship).
Colt XLR. Large enough storage, good power generation, high armor. Of the shortcomings, I note bad shields, generally low stats (really, you should pay attention ONLY to accuracy and evasion, the rest of the stats are generally unimportant... if we are not talking about Systems and one specific enemy) and a maximum of three weapons (which is also unimportant, because even two shots each turn will consume more energy than the ship is able to recover).
Spearhead SS. I do not really respect this ship, it seems to me that it does not justify its price. Although some use can still be found for it, this is a ship that is initially ready for battle, which allows you to install fewer upgrades and leave more space for the crew members (they take up space not occupied by upgrades, if you did not pay attention). I would prefer the Colt to this ship, nevertheless...
Moondast Gruss. Did I seem to say that I don't have much respect for the previous ship? Scratch that. At first glance, the ship is interesting: high energy output, high armor, built-in repair module and a relatively good cannon. A few "little things", however, spoil everything - the lack of shields (that is, you need to repair the ship after each battle), low accuracy and evasion (that is, the ship will be slower to destroy opponents and receive more damage from their attacks), only 4 slots for upgrades/crew and and a VERY small storage.
The WORST ship among all if you forget about the starting rusty bucket.
MS-XI (I can't understand all the time or just forget, are these Roman numerals or an abbreviation?). Good stats, 9 slots for upgrades, useful built-in equipment. A very good ship, the disadvantages of which I will attribute only to the not very remarkable storage and the inability to take on board the entire crew at the same time.
Clydesdale K7. The advantages of this ship are easier to list than the disadvantages: better storage, the best number of slots for upgrades, and a +2 bonus to the maximum crew. Of the shortcomings, I will separately note the maximum of 2 guns with one already installed (that is, you can install only ONE gun!).
This ship, however, is quite capable of winning, with a maximum crew of 18 (Missile Turret, Shield Booster, 2XPower Core Tuner, Sensor Suite, Thrust Vectoring System, 8XAdvanced Quarters) has combat capabilities close to MS-XI with 9 Advanced Quarters (the same 18 crew maximum).
The main thing is not to forget to turn off the fixed EM Turret after you destroy the enemy's shields.
Sledgehammer. Not a very good ship, this model does not live up to its name. Yes, the stats are good. But the highest price, only 7 slots for upgrades, poor fixed equipment and less storage space than competing ships. As far as I remember the results of my checks, MS-XI can outperform Sledgehammer due to 11 effective upgrades against 7.
Sidewinder. The best ship in the game. Of the shortcomings, I can only note "only" 10 slots for upgrades (there is practically no fixed equipment) and the storage is average enough for a top ship.
Oh yeah, one more thing! The maximum number of guns is only 3, but this is disdainful, because even the Sidewinder is not able to continuously maintain the rate of fire of three shots (top guns of course) per turn.
Blade. I almost never used this ship, but according to my rough estimates, she is about a rank higher than MS-XI due to better stats and storage + 9 effective upgrades versus 11 for MS-XI with lower stats.
Back when you could fight Dr. Teyaal in something other than the Sidewinder, the MS-XI could be modified to always win.
When I first fought her, her tactics seemed to me not very smart (acted as if it was she who fought on the most powerful ship in the game, not me.) and the ship was rather weak (although, of course, she is a loner and is not able to use the crew turrets). But when in version 0.8.012 I fought it myself using MS-XI - she turned out to be quite powerful! I have never lost, but taking into account the fact that I specially adjusted the ship to fight personally with her...