Burbage rocks is a lovely area to walk and explore.
Yes....and pretty close to Stanedge Edge...so once having found area possible to visit area a couple of times to do both.
I don't know what route book suggests for Stanedge Walk but at 5 miles it's possible to start at centre of Hathersage, get up to edge on one route, walk a bit of the edge then get back to Hathersage using different paths.
If so...that would be an attractive proposition...couple of good cafes at Hathersage, pleasant village.