Is there any benefit in doing an MSc over a PGDip? (UK)

Universities such as London South Bank Uni offer both options for OT postgrad - from my understanding the PGDip would be slightly less gruelling based on the fact it doesn't require a dissertation.

Other than this main difference, is there any reason someone should consider the MSc over the PGDip? Like, could it impact any future opportunities like job eligibility or working abroad?