Faulty M1?

I recently bought 6 Neo Pi's and 2 M1 Pi's.

The Neo Pi's were pretty simple and quick to setup and the speeds are what
I would expect from such hardware. However, the M1 is a lot slower, infact
simple linux commands which should take seconds are taking several minutes.
When performing speed tests, the Pi appears to freeze and lag.

All the Pi's use the same micro SD card, the same power supply, the same OS
build. What is wrong here? Do I have faulty Pi's?

   If  you want to compare the two boards ,you need to use the same image
such as ubuntu core which provided by friendlyelec.