Consider these two boats...

Engineer Captain

Passives
Romulan: Enhanced Shield Systems, Emergency Secondary Shielding
Omega: Hull-Repairing Nanites, Superior Shield Repair

TT1, FAW2, APD2, APO3
THY1, TS2, DPB2
EPtS1, AtS1
ET1
HE1, TSS2

DOFFs: SDO(BFI), DCE(AtS), Conn(TT), ME(ET), EWO(Beam)

Weapons
Fore: Omega Torpedo, Experimental Beam Array, 2x Romulan Plasma Beam Array
Aft: Hyper-Plasma Torpedo, Plasma Mines, Cutting Beam

D/E/S: Borg

Consoles
Tac: 3x Plasma Infuser, Ambiplasma, 0Point
Eng: Neut, SIF, Borg, Tachyokinetic
Sci: Romulan Emitter Array [Pla]

...versus...

Engineer Captain

Passives
Romulan: Enhanced Shield Systems, Emergency Secondary Shielding
Omega: Hull-Repairing Nanites, Superior Shield Repair

TT1, FAW2
TS1
EPtS1, RSP1, DEM2, AtS3
EPtW1, ET2
PH1, HE2, TSS3

DOFFs: SDO(BFI), DCE(AtS), 2x DCE(EPt), WCE(EPt)

Weapons
Fore: Omega Torpedo, Experimental Beam Array, 2x Romulan Plasma Beam Array
Aft: Hyper-Plasma Torpedo, Cutting Beam, 2x Romulan Plasma Beam Array

D/E/S: Borg

Consoles
Tac: 2x Plasma Infuser, Ambiplasma
Eng: Neut, SIF, Borg, Tachyokinetic
Sci: Romulan Emitter Array [Pla], 0Point

...where each has the additional following base stats (unmodified by skills):

Hull: 34500
Shield Modifier: 1
Crew: 50
Devices: 2
Turn: 20
Impulse Modifier: 0.22
Inertia: 70
+15 Weapon Power
+10% Bonus Defense

Hull: 39500
Shield Modifier: 1
Crew: 700
Devices: 4
Turn: 7
Impulse Modifier: 0.15
Inertia: 40
+5 All Power

So in looking at the first ship vs. the second ship (before skills/modifiers):

-5000 Hull
-650 Crew
-2 Devices
+13 Turn
+ 0.07 Impulse Modifier
+30 Inertia
+10 Weapon Power
-5 Aux, Eng, Shield Power
+10% Bonus Defense
+THY1, TS2, DPB2, APD2, APO3
-TS1
+ET1, AtS1
-EPtW1, ET2, RSP1, DEM2, AtS3
+HE1, TSS2
-PH1, HE2, TSS3
+Conn(TT), ME(ET), EWO(Beam)
-2x DCE(EPt), WCE(EPt)
+Plasma Mines
-2x Romulan Plasma Beam Array
+Plasma Infuser

Yes, some of that's basically:
TS2 instead of TS1
ET1 instead of ET2
AtS1 instead of AtS3
HE1 instead of HE2
TSS2 instead of TSS3

Yes, that means the first ship's carrying four of the six heals - missing Science Team and Extend Shields.