No two firms of accountants are the same. You'll be hard pressed to find one that doesn't profess to offer a better service, a service that adds value, a service designed for your specific requirements. Many use almost the same words to describe how different they are and to explain 'the reason to choose us'.
To get the best from your accountant requires communication. Do they understand what you want (or need)? Are you comfortable asking them anything? And can you understand what they tell you? Can we give you what you need, at an acceptable cost? That is our aim. Only you can judge.