I dont know much about bicycles and I would like some help to choose the best of those two.

K2 Attack 1.0 2005

Wheelset: 32 hole disc-compatible double-sealed quick-release hubs
Frame: 7000 Series Aluminum
Fork: SR Suntour XC-60 100mm travel
Front Derail: SR Suntour XCC202
Rear Derail: Shimano Alivio
Shifters: Shimano EF29 EZ-Fire, 8 speed
Brakes: Tektro IO mechanical disc
Tires: Kenda Klaw XT, 26x2.1
Cassette: SunRace 8 speed 11-32
Seat: WTB Speed V Sport
Seatpost: Aluminum alloy micro adjust, 300mm
Grips: K2 Pipe Clamp lock-on
Pedals: Resin MTB
Stem: Ritchey Zero Stack, 1 1/8
Headset: Ritchey Zero Stack, 1 1/8
Crankset: SR Suntour XCC-250, 170mm, 22/32/42

Mongoose Wing Elite 2005

Fork: RST Gila T5, 80 mm
Front Derail: Shimano Acera
Rear Derail: Shimano Acera
Shifters: Shimano EF-29 EZ Fire
Hubs: Alloy Disc Q/R 32H
Rims: WTB Dual Duty XC
Brakes: Tektro IO floating caliper disc
Tires: Hutchinson Mosquito 26x2.0
Cassette: SRAM PG-830 11-32t 8sp
Seat: WTB Speed V Sport
Seatpost: Alloy w/ integral head 300mm
Handlebar: True Technologies alloy 30mm rise
Grips: Mongoose Pro logo grip
Pedals: Alloy Platform
Stem: True Technologies alloy Ahead
Headset: 1 1/8 Zero stack steel cups
Crankset: TruVativ X-Flo forged alloy
Rearshock: RST -22