Jon,
Absolutely! Just because 2 songs share a few words and one may have been inspired by the other certainly doesn't make them the same song by any stretch of the imagination.

The only thing I can see they have in common is the one line 'Over the hills etc' and this we demonstrated recently on another thread derives from earlier ballads of the 17thc so both songs could derive from the earlier independently, or their similarities could simply be mere coincidence.