Compare bus and train costs.
Comparing a coach fare with a rail fare on price alone answers the wrong question, because the two are selling different amounts of your day. Adding the journey time at whatever you value an hour converts both into a single all-in figure. On a 200 mile trip a coach at 35 dollars taking 4.5 hours and a train at 78 taking 2.5 are almost exactly level once an hour is worth 15 dollars — and the train wins outright above about 21 dollars an hour. Choose the value of time deliberately: for a leisure trip where the journey is pleasant it may be near zero, while a working day lost has a real number attached.
Bus vs Train Cost
Bus all-in = bus fare + bus hours x value of time; train all-in = train fare + train hours x value of time; difference = |bus - train|
It depends on whether the time is usable. Rail time with a table and power is often productive; a coach seat rarely is, which is an argument for valuing coach hours higher than rail hours.
No track access charges, far lower capital costs and much higher seat density. The trade is speed and comfort, which is exactly what the time adjustment prices.