Wow Ronaldo has more 4 more assists, 14 more goals in the CL than messi, whilst only 4 more were penalties than messi took himself
The 2 years age difference makes no difference either because Messi already looks 1/8th a level below himself with every passing month without iniesta and Xavi around him whilst Ronaldo continues to age in to a formidable striker who tries to simplify his game to different team mates and tactics in Italy.
Messi spending his career loyal to Barcelona has made him La Liga's best ever player, dribbling past the same defensive tactics has made him great on the eye but not even to be the best ever argentinian player to Argentinian fans - because ultimately he is that, hes great on the eye and for some reason reason that's enough for some fans for him to be the GOAT. Fair enough.
Ronaldo on the other hand started as a completely lost winger as sporting Lisbon crossing balls in, then becoming a mix of that and an inverted forward at United, at Real Madrid become a complete inverted forward scoring goals for fun and now at Juventus is becoming a Centre forward or striker.
Never mind the trophies both international, variously domesticated that he trashed messi with never mind the scoring record - he absolutely runs Messi with his career and the only thing Messi does better than him is playing better than him on the eye with is largely helped by playing for the same league and same team for whole of your career.
C. Ronaldo at Barcelona in David Villa's position would have been doing better than what he did at Real Madrid and if pep had gone for zlatan then I dont see why Ronaldo wouldn't have been an option.
GOAT.