Of course you're going to say that. You only have to look at the salaries offered to ACA qualified accountants over certified accountants to see what the industry thinks. Also just look at the requirements for doing the ACA and ACCA at the same firm and I think you'll find you need to be a fair bit better academically to be accepted onto the ACA.
I still don't agree with what you're saying. Every job I see accepts applications from ACA or ACCA qualified accountants (and often CIMA, depending on the job). They don't say ACA salary for this job is £40k but for ACCA we'll pay £35k, it's always the same. Maybe you could provide some examples?
The company I work for have trainees studying ACA or ACCA and pay the same.
Regarding the requirements to qualify, I can't see much difference. For both you need to pass all the exams, complete 3 years professional work experience and complete a training record.
So what is it you mean when you imply the requirements for ACA are tougher?
Personally I see very little difference between the 2 professional bodies.