Comparison of X73 vs QX90 vs H8mini

Eachine X73 Specs:

Size: 105*105mm
Flight controller: Naze32
Motor: 7016 Brush Motor
AV Wireless Transmitter: 5.8g 25mw
Batterry: 1S 350mah 25c Lipo battery (Not included)
Flight time: 5-6 minutes
Takeoff weight : <40g
Camera Pixel: 5MP
SENSOR: 1/4"" HD Sensor
Resolution: 1280*960
TV Format: PAL

Eachine Tiny QX90 Specs:

Size: 118*118*70mm
Weight: 39g (without battery)
Wheelbase: 90mm
Flight controller: SP RACING F3_EVO_Brush
Firmware version: Cleanflight 1.13.0
Motor: 8520 Brush Motor
Prop Size: 55mm
Receiver: Built-in Frsky compatible 8ch SBUS receiver
Camera: 520TVL HD CMOS 1/4 inch Camera
AV Wireless Transmitter: 5.8g 25mw 32ch
Batterry: 3.7V 600mah Lipo battery
Flight time: 5-6 minutes

Eachine H8 Mini Specs:

Product size: 13.5*13.5*2.8cm
Package size: 14.5*7.8*13.5cm
Quadcopter weight: about 20g
Frequency: 2.4G  
Gyro: 6 axis
Product battery: 3.7V 150MAH(Included)
Remote battery: 3 x AAA dry battery(Not included)
Charging time: 45mins
Flying time: 5-7mins
R/C distance: about 30m            
Flying distance: about 30m