couple of yrs in the NBA.
I don't think any athlete from 100 yrs ago could compare to today given the advantages to modern training, diet, & conditioning. If you even those things out, you might have even more of a point as i think about it.
Ruth had to bat against pitchers from a higher mound. Ruth didn't enjoy playing against the talent dilution resulting from so many teams these days (but then again, there is a greater population# playing baseball now given world population, and there are the Central American and Cuban players as well as African American players that Ruth never faced which was probably an even bigger advantage for Ruth)
But since those things are not evened out, I have to go on my eyes. I think Ohtani was better.
Still, Ruth has the championships as well which Ohtani must chase.