after seeing the GT Aggressor XC 2 for £399.99  i was looking at the GT Aggressor XC 1 Mountain Bike 09 18" for £579.99
was wondering does anyone think the gt xc1 is worth the extra £179.99 for the difference in the spec below?
GT Aggressor XC 1 Mountain Bike 09 18" 
Frame Material: Aluminium 
Frame Size: 17-18 
Gender: Mens 
Suspension: Front 
Alloy Rims: Yes 
Brake Type: Hydraulic Disc 
Chainset: Truvativ Blaze 3.1 chainset with sealed bearing BB 
Exact Frame Size: 20" 
Forks: Marzocchi 33R, 120mm travel, 15mm axle, adj rebound 
Frame Colour: Black 
Frame-: Superlight hydro-formed Triple Triangle frame with butted tubing 
Front Brake: Avid Juicy 3 hydraulic disc brakes, 185rotors 
Front Mech: Shimano Deore 
Gear Shifters: Shimano Deore Rapid Fire 
Handle Bars: GT oversize 
Headset: GT Alloy 
Hubs: Formula Disc / Shimano M475 
Number of Gears: 27 
Pedals: Classic Cage with Toe Clips 
Quick Release Wheels: Yes 
Rear Brake: Avid Juicy 3 hydraulic disc brakes, 160mm rotors 
Rear Mech: Shimano SLX 
Rear Shock: NA 
Rims: Alex DP17 disc rims 
Saddle: SDG Bel Air saddle 
Seatpost: Alloy Black 
Stem: GT Oversized 
Tyre size: 2.3" 
Tyres: Maxxis Ignitor 
Wheel size: 26" 
GT Aggressor XC 2 Mountain Bike 09 18"
- Frame Material: Aluminium
 
- Frame Size: 17-18
 
- Gender: Mens
 
- Suspension: Front
 
- Alloy Rims: Yes
 
- Brake Type: Hydraulic Disc
 
- Chainset: Truvativ Isoflow chainset with sealed Bearing BB
 
- Exact Frame Size: 20"
 
- Forks: Suntour XCR fork, 120mm travel, rebound damping & lock-out
 
- Frame Colour: Black and White
 
- Frame-: Lightweight hydro-formed aluminium Triple Triangle frame
 
- Front Brake: Tektro Auriga Comp hydraulic disc brakes, 180rotors
 
- Front Mech: Shimano Deore
 
- Gear Shifters: Shimano Deore Rapid Fire
 
- Handle Bars: GT oversize
 
- Headset: GT Alloy
 
- Hubs: Formula DC 20
 
- Number of Gears: 27
 
- Pedals: Classic Cage with Toe Clips
 
- Quick Release Wheels: Yes
 
- Rear Brake: Tektro Auriga Comp hydraulic disc brakes, 160rotors
 
- Rear Mech: Shimano Deore
 
- Rear Shock: NA
 
- Rims: Alex ASD-1 disc rims
 
- Saddle: SDG Bel Air saddle
 
- Seatpost: Alloy Black
 
- Stem: GT Oversized
 
- Tyre size: 2.3"
 
- Tyres: Maxxis Ignitor
 
- Wheel size: 26"
 
- Approximate Weight (KG): 12.7