Renters: “What does Oberlander (or Chasam Sofer) have to do with Yekkes?”
The Chasam Sofer was a Yekke from Frankfurt. The Chasam Sofer is considered the leading godol of Oberlander Yiddishkeit.
“Their minhagim (including havara) are closer to Chasidim.”
Who told you that?
Minhagim is not the same as havarah as well.
In havarah, Oberlander havarah is in between the havarah of many Chasidim and Yekkes. It is not the same as Chasidim like Satmar.
Oberlanders are sometimes referred to as Hungarian Yekkes, as they share certain things, like davening Ashkenaz, not being Chasidish, and historical connections.