¿Who is stronger, Groot or Piccolo?

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.

Piccolo is a pivotal character in the "Dragon Ball" series, known for his complex evolution from a formidable antagonist to a steadfast ally. Initially introduced as the reincarnation of the evil King Piccolo, he sought vengeance against Goku for his father's defeat. However, after being bested by Goku in the 23rd World Martial Arts Tournament, Piccolo's trajectory shifted. Recognizing the looming threats to Earth, he reluctantly allied with his former adversaries. A significant turning point in his development was his mentorship of Gohan, Goku's son. This relationship fostered a deep bond, revealing Piccolo's capacity for compassion and selflessness. Throughout the series, Piccolo's abilities are showcased through his exceptional combat skills, strategic acumen, and unique Namekian traits, such as regeneration and powerful energy-based attacks. His journey from villain to hero underscores themes of redemption and personal growth, solidifying his status as a beloved and multifaceted character in the "Dragon Ball" universe.