According to my point of view, bounties are much better than airdrops. Because the amount you get from an airdrop is little and sometimes most of the airdrop tokens are difficult to exchange due to the higher GAS price than the return. But there are some good airdrops that getting few tokens can change your life. You have to spend more little time and effort to do a bounty but at the end of the day you'll get better benefits than airdrops.
In terms of bonuses, the bounty will get higher than the airdrop, but the time it takes to complete the bounty is much longer, sometimes up to several months. If there is time I think you can do bounty and airdrop simultaneously, the key to success is to choose a good project, join and fulfill the assigned requirements.
