Working in a ca firm vs working in a corporate

Dear friends,

Iam a ca final student, completed articles and working in a ca firm as a senior assistant.

I now want to start my corporate career.

Please tell me whether working  in a corporate will be less tougher or more tougher than working in a ca firm.

What challenges can a person who enters into a corporate from a ca firm face initially?

Thanks to all of you in advance.