SAN FRANCISCO — In case it wasn’t already crystal clear that plaintiffs and defendants in patent suits have different ideas about where they want to litigate, another nasty East Texas-Northern California turf fight has broken out, this time between Google Inc. and Rockstar Consortium, the IP firm partly owned by Apple.

The feud started when Rockstar filed a spate of suits in the Eastern District of Texas against gadget-makers who use Google’s Android platform. Mountain View-based Google upped the ante in December with a declaratory judgment action in the Northern District of California.