The Yekkes in Washington Heights are yeshivish/charedi because they have assimilated.
TUM is YU’s motto, it is not the derech of MO. MO would be TIDE.
That is precisely why the difference between yeshivish and MO is much smaller than yeshivish and chassidish. There are extreme fundamental differences in hashkafah between litvish and chassidish Jews.
I also think this discussion has no place at all in the workplace. The two things never to discuss at work are politics and religion.
Add to that that you may run into issurim of discussing religion with your coworkers. Add to that that many people have only a kindergarten understanding of religion and would most likely not do too well in a discussion.