¿Who is stronger, Groot or Whis?

Groot is a character in the Marvel Cinematic Universe (MFCU) who is also part of the Guardians of the Galaxy. Groot is an extraterrestrial being who belongs to the Flora colossus species, a race of arboreal humanoids capable of regenerating and controlling their own plant bodies. In the UCM films, Groot is portrayed as loyal and brave, yet innocent and sometimes childlike in nature. Groot has a very distinctive personality and his vocabulary is limited to the phrase "I am Groot", although other characters seem to be able to understand his meaning based on context and intonation. Groot possesses superhuman strength and stamina thanks to his wooden body, as well as the ability to regenerate and grow his limbs at will. He can also throw sharp spines and control the vegetation around him. Throughout the UCM films, Groot plays an important role in the fight against the forces of evil, even sacrificing himself to save his friends on one occasion. After his sacrifice, a new Groot is born from a branch, meaning the character is essentially immortal.

Whis is a prominent character in the "Dragon Ball" series, serving as the angelic attendant and martial arts master to Beerus, the God of Destruction for Universe 7. First introduced in the film "Dragon Ball Z: Battle of Gods," Whis is depicted with a serene demeanor, light blue skin, and distinctive white hair. As an angel, he possesses extraordinary abilities, including Ultra Instinct—a state of heightened reflexes and movement. Whis is responsible for training both Beerus and Goku, aiding them in mastering advanced combat techniques. Despite his calm and composed nature, he exhibits a fondness for Earth's cuisine, often indulging in various delicacies during his visits. His character adds depth to the series by exploring themes of divinity, mentorship, and the balance of power within the universe.