and the Intercity V-set:
... and the predecessor to the Millenium Bug, the Tangara (normally marshalled in sets of eight carriages):
While the M-set looks nicer from the outside, the V-set is the best to ride in for longer distances, because of the older fashioned seats that are 2+2 across rather than 2+3 across. As an Intercity, it also has a top speed of 130kph (though AFAIR there is a speed limit on the system of 115 kph). I've been accused of being a Marxist, yet while Harpo's my favourite, it's Groucho I'm always quoting. Odd, that.
Perhaps because of their narrow doors, with a second door into the vestibule, the V-sets cope with the heat well, unless the air conditioning goes out in a carriage, in which case it tends to empty out as soon as there is space in the other carriages.
The Tangara windows are tinted, so they don't let in much heat, and they have stronger air conditioning. It gets hotter in the platform level sections, which have metro type seating and standing room, but is OK in the seated upper and lower decks.
The M-bugs have even stronger air conditioning, and AFAIR, there are two independent air conditioners in each carriage, so their air conditioning cannot fail all at once.
None of them are kept as cold as the trains I remember in Singapore, but that is probably driven largely by choice of thermostat setting. I've been accused of being a Marxist, yet while Harpo's my favourite, it's Groucho I'm always quoting. Odd, that.