I'm analyzing one of my domains, I see a large difference in domains shown from ahrefs vs google. I see a good number of spammy backlinks that show in aHrefs, but they don't show in GWT. Now GWT says they are pretty good at weeding out crappy domains and hence the 100 or so domains I thought were crappy, didn't exist in GWT. The leads me to believe google already disavowed those domains and I really don't have to, but I did anyway. Have anyone seen a boost in SERP from disallowing domains that weren't even listed in GWT as a linked domain?