Hmm, probbly not the same, they just have a similar look about them. The ones on Anglezarke are supposed to be like the Severn-Cotswolds tombs & the pikestones may well be, but the ones on Black Coppice don't look like any SC tombs I've seen.

http://www.themodernantiquarian.com/site/4874 in particular
http://www.themodernantiquarian.com/post/24603

However they may be covered in 5 ft+ of peat so its hard to tell...