well, i can rule 1 out right away-- do not use the pico psu. these require regulated 12volts-- cars voltage is usually around 12 volts, but can go from 5v to 15v. the pico psu just sends that to the motherboard--it will kill computer parts.
though, after reading a little more(i do not understand russion, so that could be part of the problem) it seems to refer to the M3 as a pico psu as well.
if the site is just refering to the small size of the psu, then it is a different story.
i believe all Pico PSU models(the ones to avoid) use a yellow 20 pin connector
can i ask why you are only deciding between the m1 + m4? there are 2 models in between that could work as well.
you really need to look at what you want to power with the psu, and then add up the approximate maximum power consumption of each device to see what product best fits your needs.