those are trackers that can be useful to download from and seeding to others and have identical releases with the same order

Which we know with "cross-Seeding"

nCore >>>>> Bithumen

nCore pretime is fater by 1-5 than Bithumen and both releases are identical in many releases

TorrentDay >> Many General Scene trackers

i will edit and enrich the post but need members Additions to the post