What are the differences between Flkvangr and Valhalla in Norse mythology?

Flkvangr and Valhalla are both realms in Norse mythology where warriors go after death, but they are ruled by different goddesses. Flkvangr is overseen by the goddess Freyja and is said to be a lush and beautiful land. Valhalla, on the other hand, is ruled by the god Odin and is a grand hall where warriors feast and prepare for Ragnarok, the end of the world. Warriors chosen by Freyja go to Flkvangr, while those chosen by Odin go to Valhalla.