Different rebbes do different things. That is true. On the other hand, the Klausenberger rebbe was known for taking a very long time to daven. Each word very enunciated. Friday night davening could easily be on motzei Shabbos.
Bobov Shabbos davening is also a long time as well. I was there once, my lunch meal where I was sleeping in BP was at 1 pm and they were just in the middle of mussaf.
Karlin-Stolin on 16th in BP starts earlier and ends earlier. When I was there it ended by 10:30-10:45 (in Summer).