Dante in SMT's abilities: Powers and Abilities: Superhuman Physical Characteristics, Regenerationn (Unknown), Expert Swordsman and Marksman, Elemental Attacks (Lightning, Earth and Force/Wind), Instant Death (With the Almighty attack Stinger), Stat Buffing/Debuffing (Increases enemy strength and decreases enemy defense with Provoke, Removes all debuffs with Holy Star, Increases strength by 1.5 with Son's Oath), Almighty attacks that bypass all defenses, Can kill souls, Can hurt intangible beings
Vs his canon counterpart:
Powers and Abilities: Superhuman Physical Characteristics, Weapon Mastery, Skilled actor, musician, and athlete, Energy Manipulation, Elemental Manipulation, Hellfire Manipulation, Darkness Manipulation, Light Manipulation, Time Manipulation (Via Quicksilver style and the Bangle of Time, allowing him to slow and stop time respectively), Regenerationn (At least Low-Mid, though it works almost instantaneously), Teleportation, Telekinesis, Levitation, Self-Duplication, Can survive without oxygen and in a vacuum, Superhuman Willpower, Energy Absorption (Can absorb the powers of other demons and fashion them into relics), Can channel his devil energy into other objects such as weapons to amplify their effectiveness, Summoning, Spatial Manipulation via Yamato, Transformation in the form of Devil Trigger and Royalguard Style, Flight via the Devil Trigger, Self-Healing via the Royalguard Style, Can induce mental incapacitation via dark voids, Bat Manipulation via Nevan, Preternatural Senses/Minor Precognition via the Alastor blade, Minor Transmutation with Gilgamesh, Can harm Intangible beings and destroy souls, Can transmute the souls of dead demons into weapons, Attack Reflection with Royal Guard, Resistance to Mind Manipulation, Soul Manipulation, Blood Manipulation, Poison, Illusions, Fear Manipulation and Hellfire
I mean, SMT Dante doesn't even have the Devil Trigger. He definitely has Electricity and Wind Manipulation through his weapons, don't know about earth Manipulation. Don't think he has Instant Kill, Buffing, or Almighty attacks normally, but in SMT he doesn't even have his Regenerationn.
Xeno Goku likely has a few things through approximation, but the Videogame composite Goku would definitely have unique abilities beyond what we normally know. Space Time Manipulation. Resistances. Summoning. Being able to merge with Shenron, so possibly even Shenron's powers. That's almost as much as what Dante has in SMT.