I was comparing the eight years 2018-2025, which represents Ohtani's entire MLB career. Ohtani has played 70 more games and had 100 more plate appearances in that time. Yet Judge leads him 52.9 to 36 in hitting/fielding fWAR.
Add in the pitching, you get another 13.7 fWAR for a total of 49.7 for Ohtani.
So yes, Judge leads him by 3.2 fWAR over those eight years, but Ohtani has had more games and PAs, and pitches. And the time frame I've selected doesn't even include Judge's 4th best year. If I included Judge's abbreviated cup of coffee season and his first full year, his fWAR goes up to 61.6,
If you want to use bWAR, Judge is at 62.3 to Ohtani's 51.5. I'd also like to note I'm not a Yankee fan, nor am I a Judge fanboy. All I'm doing here is being objective and using publicly available data.
What Ohtani did today is the second best appearance in the history of playoffs (I still think Larsen is ahead because nobody expected that and it was in the WS). Ohtani will certainly be in the HoF, probably unanimously. There is no question he's great.
I don't know why the conversation about "best ever" even needs to happen. No matter how many games he plays, he's not going to equal Willie Mays, who is #1 by far in the post-integration/no steroids category.