They look similar because they are essentially heat exchangers, only difference is the tubeside is hot for radiator whereas it's cold for the evaporator.

It's a labour intensive job.

For cars out of warranty, I'd replace it when:
1. It's leaking - affects cooling and I wouldn't want to breathe in the refrigerant.
2. It's become so dirty that it affects cooling - imagine there is no heat exchange due to plugged fins. Since we need to dismantle the dashboard to clean it, we might as well change it.

Iinm it's to clean up the ac system where refrigerant flows, to remove dirt or maybe residual dirty compressor oil.
I won't do this if my ac is running fine. Only if I change compressor, perhaps. But then again, a simple evacuation to remove air is probably all I need when changing compressor if the ac is fine before the compressor gives way.
The thing is, is the machine they use clean enough? Sekali it introduces more dirt, or loosen existing dirt and causes plugging.

Bro, it's 1.5L or 1500cc

Might as well don't put any filter when visiting SC?

Actually, since the car doesn't come with filter, there is no scheduled filter change. So why worry about being asked to change filter? I don't suppose they go through your service history and tell you "Mr. XYZ our records show you put in a filter in ABC SC on *date*. So now you must change filter based on intervals specified for cars with filter"

I understand the part you mentioned. It's the filter replacement issue I was responding to.
There is no filter replacement requirement for brv because there is none to begin with.
So why the difference with those who installed filter at sc? Question is, does the SC which installed the first filter update this status inside their computer system, thus making it compulsory to change filter from then on?

I see... thanks for the info.