There is no difference in any of the models engine or suspension wise except for the 05' Track/Anniversary model. It has 300 crank hp compared to 287 but you lose some torque. Also the rev limiter is raised to 7200rpm's
Here is a rundown on all the models and specs. The only thing that has changed really this year is with the track/anniversary model. The diffference between the models are wheels, cruise control, traction control, and other ammenities for the most part.
The different trim levels go from Base, Enthusiast, Performance, Touring, Track which are all listed below.
BASE MODEL
6-Speed MT Only - $26,269
Engine
Longitudinally-Mounted 3.5L 24-Valve DOHC VQ35DE V6 engine producing 280+ horsepower and 260+ lb/ft of torque
Drive-By-Wire Throttle
High Flow Intake System
Continuously Variable Valve Timing (CVTCS)
Micro-Finished Crankshaft and Camshafts
Molybdenum Coated Pistons
Sequential Multi-Port Electronic Fuel Injection
Nissan Direct Ignition System (NDIS)
Transmission
6-speed close-ratio manual transmission
Short Throw Linkage
Drivetrain
Mid Mounted Front Engine/Rear Wheel Drive
52/48 Front/Rear weight balance
Carbon-Fiber Driveshaft
Braking System
Power-Assisted 11.65" Vented Front Disc Brakes & 11.5" Vented Rear Discs
Anti-Lock Braking System (4-wheel ABS) w/ Brake Assist
Electronic Brake Force Distribution (EBD)
Suspension/Chassis
Unibody Construction with Corrosion Resistant High Strength Steel
Lightweight Aluminum Hood
Power-Assisted Engine-Speed-Sensitive Rack-and-Pinion Steering (15.9:1
steering ratio)
4-wheel fully independent Multi-Link suspension
Lightweight Aluminum-Alloy suspension components (suspension arms, entire rear subframe, etc)
Front and Rear Stabilizer Bars
Rear Strut Tower Brace
Aerodynamics
Low coefficient of drag with under car air management system
Flat underbody design with deflector and diffuser plates
Exterior
Aluminum-Look Door Handles
Full Body Color Mirrors and Bumpers
Flush-Mounted Headlights
Dual Outlet Exhaust
High Output, Flush Mounted Halogen Lighting System
17" X 7.5" 7-Spoke Aluminum-Alloy Wheels
P225/50WR17 Front & P235/50WR17 Rear High Performance Michelin Tires
Comfort and Convenience
Tilt Steering Column and Integrated 3-Bay Instrument Gauge Cluster
Automatic Temperature Control System
3-Guage Cluster with Oil Pressure, Voltmeter and Trip Computer
Power Windows, Locks and Mirrors
Remote Keyless Entry System
Variable Intermittent Front Windshield Wipers
Rear Intermittent Wiper
Overhead Sunglasses Storage Compartment
Electric Rear Window Defroster
Leather Steering Wheel & Shifter
Aluminum Interior Accents
6-Way Manual Adjustable Driver’s Seat
160-Watt AM/FM/CD w/6 Speakers
Safety and Security
Dual Stage Supplemental Air Bags
Vehicle Security System
Seat Belts w/Pre-Tensioners & Load Limiters
Nissan Vehicle Immobilizer System
ENTHUSIAST
6-Speed MT - $28,249
5-Speed AT - $29,219
Includes Standard Equipment Plus:
Xenon 4-Bulb High Intensity Discharge Headlights
Traction Control System (TCS)
Viscous Limited Slip Differential (LSD)
Cruise Control
Homelink Universal Transceiver
Aluminum Pedals
Day/Night Automatic Rear View Mirror
Dual Illuminated Vanity Mirrors
Optional:
5-speed Electronically Controlled Automatic Transmission with Manual Shift Mode
PERFORMANCE
6-Speed MT Only - $30,429
Includes Standard Equipment Plus:
Vehicle Dynamic Control (VDC)
18" X 8" 6-Spoke Aluminum-Alloy Wheels
P225/45WR18 Front & P245/45WR18 Rear High Performance Michelin Tires
Tire Air Pressure Monitor
Xenon 4-Bulb High Intensity Discharge Headlights
Traction Control System (TCS)
Viscous Limited Slip Differential (LSD)
Cruise Control
Homelink Universal Transceiver
Aluminum Pedals
Day/Night Automatic Rear View Mirror
Dual Illuminated Vanity Mirrors
TOURING
6-Speed MT - $33,179
5-Speed AT - $31,589
Includes Standard Equipment Plus:
Touring Models w/5-Speed Automatic Transmission:
Bose 7-Speaker 240-watt Audio System w/ In-Dash 6-Disc CD Changer, AM/FM Stereo and Cassette Player
Leather-appointed Seats
Power 4-way Driver’s Seat
Power 2-way Passenger Seat
Heated Seats
Heated Mirrors
Xenon 4-Bulb High Intensity Discharge Headlights
Traction Control System (TCS)
Viscous Limited Slip Differential (LSD)
Cruise Control
Homelink Universal Transceiver
Aluminum Pedals
Day/Night Automatic Rear View Mirror
Dual Illuminated Vanity Mirrors
Touring Models w/6-Speed Manual Transmission Additionally Include:
Vehicle Dynamic Control (VDC)
18" X 8" 6-Spoke Aluminum-Alloy Wheels
P225/45WR18 Front & P245/45WR18 Rear High Performance Michelin Tires
Tire Air Pressure Monitor
TRACK MODEL
6-Speed MT Only - $34,079
Includes Standard Equipment Plus:
Brembo Brakes with 4-Piston Front Calipers, 2-Piston Rear Calipers
Front 12.75" Vented Front Discs and 12.67" Vented Rear Discs
18" X 8" 6-Spoke Super Light Forged-Aluminum Alloy Wheels by Rays
P225/45WR18 Front & P245/45WR18 Rear High Performance Michelin Tires
"Zero Lift" Package for high speed stability including:
-Rear Drag Reducing Spoiler
-Front Spoiler
Vehicle Dynamic Control (VDC)
Xenon 4-Bulb High Intensity Discharge Headlights
Traction Control System (TCS)
Viscous Limited Slip Differential (LSD)
Cruise Control
Homelink Universal Transceiver
Aluminum Pedals
Day/Night Automatic Rear View Mirror
Dual Illuminated Vanity Mirrors
Tire Air Pressure Monitor