Thanks all for your feedback. So useful and much appreciated. I do know that they are different jobs! I am leaving a long time job and considering my options in quite a broad way.
I am currently in business and may well stay there, as I have many years of experience, a decent earning ability and also enjoy the corporate perks.
As to why I am considering moving. When I look completely honestly at my strengths, they lie less in the corporate gameplay, quick decision making, analytics, presenting, multitasking, delivering to fast deadlines , selling etc. Whilst I can and do do these things...my true strength are loyalty, caring nature, interest in others' motivations, building easy rapport, creative thinking, idea storming, eagerness to learn and gather more information, interest in human behaviour, tolerance etc.
Hence I wonder if I would be more suited /get more out of a career helping people. Psychotherapy is also very interesting to me. I thought that it had the longest training, is this not correct? I'd be interested in working with adults or with children. I also am interested in educational psychology.
I think I'd be less keen to work in a hospital setting as a mental health nurse though it is still of interest. I worry that whilst I can switch off quite well, that it would be hard to see acute mental health crisis, sedation, risk of self harm etc daily. I am also interested more in the psychological side, working through issues than the medication end of treatment. Though I do have a friend who is a mental health nurse, I don't have a good understanding of all the possible jobs that they do.