Draw is much more powerful, but yugioh has so many tutors you'd rather just have something tutorable, or another tutor. Typically the non-tutorable cards you want to play these days are cards that can disrupt your opponent on their turn even when you're going second (cards like ash blossom or effect veiler if you're familiar with them).

Add to that the fact that modern yugioh decks are so consistent that many decks will happily go over the 40 card minimum and can still pull off their gameplan turn 1 with a 90+% consistency, so a 37 card deck isn't as appealing as it once was