Good luck mate , for my advice for what its worth , i am a soldier (and a walt according to some in chat lol) and i have worked with both . In my
experience ive found the Royal Marines to be the easiest to work with .
The paras are good at their job as hard, fast, aggressive troops however
that is there approach to all aspects of soldiering which at times is not
required . The Royal Marines on the other hand can be just as hard,fast
and aggressive,yet they are very flexible in their approach to soldiering.
Also they are not so far up their own arrses like a lot of the Paras .
At the end of the day mate its your choice , however the Royal Marines
tend to have a higher entry standard . Good luck in either .