it is the same.
the ep cost can change and go up.
UO can increase the ep cost if they feel the parks will have increase crowds in a park on a day in the future.
if you already purchase the ep at a lower rate and it increases, you do not pay any increase.
this only usually happens during the end of the year holiday period.
i have only seen it once to increase during the summer this year.
what are your dates?
there are some time periods where it is not worth it to buy the ep.
generally i tell others not to buy the ep in advance.
wait until you are in the parks to determine if you really need it.