Catholicism & Orthodoxy

We have this thread very often…

Just spend some time reading these and eliminate your doubts OP:
web.archive.org/web/20120302163030/http://www.aoiusa.org/2009/09/the-idea-of-primacy-in-orthodox-ecclesiology/
golubinski.ru/ecclesia/primacy.htm
oodegr.com/english/papismos/papism_insurmountable_obstacle.htm
oodegr.com/english/papismos/dogma/eksousia_petrou1.htm
oodegr.com/english/papismos/kleidia1.htm
oodegr.com/english/dogma/diafores1.htm
impantokratoros.gr/PaulBallaster_Convolier.en.aspx
orthodoxchristianity.net/index.php?option=com_content&view=article&catid=14:articles&id=39:the-vatican-dogma
orthodoxinfo.com/inquirers/papaldogma.aspx
orthodoxinfo.com/inquirers/twopaths.aspx

orthodoxinfo.com/inquirers/Guettee_ThePapacy.pdf
oodegr.com/english/biblia/Ballester/perieh.htm
oodegr.com/english/biblia/romiosyni/perieh.htm
oodegr.com/english/filosofia/nihilism_root_modern_age.htm

Orthodoxy is the way.

If you want to know their differences, just look into the ecumenical councils that both churches have done.

where do they say this?