Here’s some A/B comparison testing. Here’s Planet Cell covering Slowdive’s cover of Syd Barrett’s “Golden Hair”:
It’s pretty good…up until the end, when it becomes a sort of strident mess.
By contrast, this live version of Slowdive doing the piece themselves at the Best Kept Secret festival (which I’ve posted here before) just takes it to an entirely new level at the end, all the parts of the band meshing together for a soaring climax.