I think Dig is better in Standard by default because it is a slower format. It allows you to find the perfect card(s) for the situation at hand, and you see much deeper. Cruise is more "engine" to me. You run 4 in a deck that can handle it, but you hate whiffing and drawing like 3 lands, which happens a lot in a format like Standard, where ~24 is the current average. Cruise is also better for decks that like redundancy, rather than fetching specific cards.
Cruise is more powerful in a vacuum, but Dig is "bigger." It's better to go big in Standard, I'd say, more times than not.
Cruise is more powerful in a vacuum, but Dig is "bigger." It's better to go big in Standard, I'd say, more times than not.