I definitely spend less time per person, trying to find juniors. You have to because t What you're looking for is different. My only goal for hiring junior engineers is to find out if they know enough to not drown and if I think they're willing and able to learn fast. That takes less time and the risk is generally less because my expectations are lower and so is the compensation.
It's been a while since I hired junior people though. The roles I take are always in early phase startups and I don't have budget for people who need on-the-job training.