Been able to look at the Bodley texts now - almost all are very similar, with the garbled line:

"It tasted more fresh than gold that ne'er wasted" whatever THAT means

But this one Young Spencer the Rover

DOES HAVE the internal rhymes

More sweet then it tasted than the gold he had wasted
and
So we unite together, like birds of one feather

There is no date for this one, but maybe it is closer to the original than other versions, or perhaps it has been 'corrected' by the printer?