Typical Robot Wheels (questions) vs. Ev3 Wheels

Good day to all... I will be on a sumo robotics competition and i will use 4 typical robot dc motors (20 - 200 rpm, 3 - 4kg.cm torque) with 9v power supply, usually yellow in color with black wheels...question... Would these wheels be enough to push another robot about 1 kg as well?

if you are to compare these dc motors with different 4 Ev3 dc motors, which one has the higher torque? thanks :)  

Typical Robot DC Motors - 
http://g01.a.alicdn.com/kf/HTB1TFw0KXXXXXc5XVXXq6xXFXXXH/Free-shiping--4Lot-package-Deceleration-DC-font-b-motor-b-font-supporting-wheels-smart-car.jpg

 

Ev3 DC motors - http://mindsensors.com/img/cms/Blog_Images/Motors:%20NXT%20vs%20EV3/EV3meas.JPG 

Motors

Hi

I found online that the yellow motors have about 3.5kg/[email protected].

EV3 large motors have around 4.3kg/cm@9V and NXT large motors have aprox.5kg/cm@9V.

See bellow links for more info:

http://www.philohome.com/motors/motorcomp.htm

http://www.philohome.com/traction/traction.htm  - this one is for Lego tyres

-=Seba=-