Kartavirarjuna was easily more powerful than Arjuna .
- He is the incarnation of Vishnu Sudarshana chakra (which already makes him a superior avatar to Nara Narayana who are only a small portion of Vishnu) . Only Vishnu can defeat him not any ansh avatars .
- Kartavirarjuna has enough strength to move the oceans and rivers . Arjuna doesn't even comes close anywhere near that lvl.
- Kartavirarjuna was physically stronger than even Ravana who lifted mountain kaliash and endured the pain of getting crushed for 10,000 years from Lord Shiva. Ravan also lifted celestial mountains and also withstand the force of crores of vanaras hurling large mountains on him but he was completely overpowered by Kartavirarjuna.
- Kartavirarjuna defeated the entire army of gods , Rakhsasas and nagas just by riding on a chariot without anyone's aid
- Arjuna maybe Sabyasachi but Kartavirarjuna is superior to him with thousands of arms. He also show the ability to shoot with five hundred bows at the same time . Arjuna is comparable in terms of skill but not in terms of power and Physical strength.
- Kartavirarjuna belonged to complete different yuga where the physical strength and spiritual power were almost limitless compare to Dwapara yuga characters . Even krishna struggled to defeat jambhavan without using divine powes in wrestling match and their encounter lasted for 27 days.
- Comparing any treta Yuga warriors to dwapara yuga is pointless. They were planetary to solar system lvl even without any divyastras
Kartavirarjuna imo is the most powerful warrior in treta Yuga after Rama and Hanuman.