Looking at trains in Russia, I've found that for the same class, комфорт is cheaper than a ticket not marked as комфорт:
In the image above, for the train № 042В «Москва – Воркута», the prices are:
- 2-cl. sleeping compt., from 6.194 ₽
- 2-cl. sleeping compt. (комфорт), from 5.793 ₽
- 3-cl. open sleeping, from 4.232 ₽
- 3-cl. open sleeping (комфорт), from 4,060 ₽
In both 2nd and 3rd class, the option with комфорт is the cheaper alternative. But from the word, I would expect it to be more comfortable. I thought it might just be a quirk due to some travel classes being sold out, just like how one sometimes find 1st class cheaper than 2nd class on the Thalys, but I checked several other dates on this route, and on those dates комфорт is also cheaper. What is the difference and why is комфорт cheaper?