What have you guys heard about them? I can't decide between the ASGI Ambassador (custom TSD M4 SEAL) or the A&K SPC.

My friend is a pro and he says he would go with the Ambassador, but I kind of want a metal body...

SPECS
A&K $218
400+ fps
metal body
SPR Style Flash hider
Retractable Crane Stock
Functional Charging Handle
Free Floating RIS Hand guard
Flip-Up Front and Rear Sight
Metal Ball Bearing Spring Guide
High Torque Up Motor
Metal Bushings

Ambassador $270
330-350 fps
Madbull 12.5" RIS
Madbull 14.5" one piece outer barrel
Madbull KX3 Flash hider
Metal Bushings
Reinforced Gearbox
Steel Gears
Crane Stock for battery storage
Heavy Duty ABS Receiver
Metal Hop Up Unit
60 Days Factory Warranty offered by TSD