Kagome was just a normal girl, until one day she fell into a well that brought her to feudal-era Japan. After encountering hordes of demons and discovering that she's the reincarnation of a priestess, Kagome must now journey to protect a sacred jewel from evil with the help of a half-demon named Inuyasha. Along the way they make many enemies and friends, and travel between the modern and feudal eras.
Both anime share not only the author, but a similar dynamic and humor. If you liked the humor and character part of the story, you'll enjoy both. Myself, I found Ranma to be very funny, and really enjoyed it. Inuyasha drags a lot, and it is not good as Ranma. But it has it's own merits even if I am not able to appreciate them. If you liked Inuyasha's humor, definitely read Ranma. The inverse is true, although to a lesser extent.
Every five hundred years, the Shaman Fight takes place to choose the Shaman King - the strongest of the shamans. Now, the time has come once more for the Shaman Fight, and shamans from around the world have gathered in modern-day Tokyo to compete. One such competitor, Yoh Asakura, is determined to become the Shaman King. Together with his friends and his partner spirit, Amidamaru, Yoh sets forth on a journey to decide who is the strongest and most worthy to become the Shaman King.
Both hold interesting and unique story lines with great characters. It's all about friendship, loyalty, and some crazy enemies! You never know what's going to happen next! They'll keep you on the edge of your seat!
Both manga are similar in that the lead heroine feels conflicted about the feelings of the lead hero. She wonders if his love for her stems from his love for an ancestor that looks like her.Also, both manga deal with the love between a school girl with power and her protector. They also have elements of time travel, and having the "outsider" adjust to the new time period are somewhat central to the story.