Soto's career wRC+ is 155 has been worth 23 WAR. Its 147 this yr.
Soto already has a ring and he can at least play the OF(sort of). Has a better body type. Better GB % and BB rate. The "fallacy" of body type? For real?
Vlad's had 1 great yr. One good (132 wRC+) and two below 110 wRC+. You are way over rating his D at 1B. Its been fine. Not great.
Are you really arguing WAR, as an indicator of overall value, isn't a major factor in determining long term contract term and AAV?
Also, we know what Soto has asked for not what he is going to get. Look at actual comparables in ATL and elsewhere. Tatis illustrates some of the risk in signing early massive long term deals.