What do you need explained to you?
Giles didn't even hit the bigs until he was 24. Well, 25, really ... he got a couple handfuls of ABs at 24 as a call-up. Juan Soto posted those numbers before he was 26 years old.
So, almost before Giles' 51.1 WAR career started, Soto has a 36.4 WAR head start on him.
Giles' best season was 6.7 WAR, at age 28. So, that would be not this year, not the next year, but the year after next for Soto. And Soto has already posted a 7.9 WAR season and a 7.1 WAR season. When Giles was 25, he was contributing 1.4 WAR. At 25, Soto contributed 7.9 WAR.
Giles' best 4 years were 6.7, 6.4, 5.4 and 5.3 WAR ... all within a 4-year span running from age 28 to 31.
Soto's best 4 years were 7.9, 7.1, 5.5 and 5.5 WAR ... all before age 26.
Soto also added an age 20 5.0 WAR season ... better than any of Giles' other seasons, outside of his 4-year peak.
And Soto's age 21 season was COVID-shortened, where he posted 2.4 WAR in 49 games of a 60 game season and finished 5th in MVP voting. That WAR rate would have put him on pace for 6.5 WAR over the course of a 162 game season, assuming he played the same 82% of total games that he played in the shortened season.