Hello people,
Is there any benefit in using the same bank worldwide?
For example, If I'm banking with Standard Chartered, will there be any benefit like easy on-line banking across the world?
And will it be possible to make normal banking transactions anywhere in the world, as long as its the same bank, please?
Answers will be highly appreciated.
Thank you.

Ps. I guess exchange rates will apply but I'm more concerned about the ease of banking.