QuectelM10 Vs SIM900 GSM/GPRS Module

Hi Everyone!

I have ICOMSAT Sim900 GSM Module which I want to use with Arduino Mega. I want to run Cosm Client on Arduino Mega/
But I need to get answer for following questions:
Is there any difference in AT command set for QuectelM10 and SIM900 GSM/GPRS Modules?
Can I used COSM Client library for QuectelM10 for SIM900 GSM/GPRS module?

Regards