Trump sweeps all 4 - Safe Trump
Trump wins 3 out of 4 - Safe Trump
Trump and DeSantis win 2 each - Lean Trump
DeSantis wins 3 out of 4 - Tilt Trump
DeSantis wins all 4 - Likely DeSantis
If DeSantis wins 3 out of 4 he's undeniably the favorite, and if he wins all 4 he probably sweeps all 50 states probably.
The bandwagon effect is huge during presidential primaries, people like voting for a winner.
If Trump were to only win 1/4 it would be Nevada which comes last for Republicans I believe. A win in Nevada would re-jumpstart his campaign and give him new momentum going into super Tuesday.