MQ-135 Air quality sensor

Other Hardware Sensors
1

In my next project I would like to use an air quality sensor. I found the MQ-135.
My idea is to use the sensor to measure the gases in a work area, principally CO2 and CO.

Datasheet:

I also found the MQ-7

Is there any big difference between this two sensors ? Please let me know

2

The differences are in the datasheets and only you can say if they are relevant for your project?