Some newly issued T-bills are auctioned by discriminatory pricing in Dutch auctions, whereas other newly issued T-bills

Question:

Some newly issued T-bills are auctioned by discriminatory pricing in Dutch auctions, whereas other newly issued T-bills are auctioned by uniform prices second-highest sealed-bid ascending-price auctions. Which auction design is more like private placement of corporate newly issued bonds and IPO stock? Which auction design is more likely to increase seller revenue?