the two mentioned technics, Websphere MQ MFT and Websphere MQ Queue, are completely different.
So it depends on your requirements. You wrote that your are heavily using files in order to exchange data.
Using Oracle AQ you will not have any benefits and using MFT it is the by far the faster way.
Thank you for the helpful answer, but is there no other product that I can compare to WebSphere MFT and also satisfies the requirement?
I need to send files in a secured environment to external parties, the external parties might use the same software or might not but they are outside of our control, the proposed improvement has to work with the existing environment that sends files through sftp.