Would you rather... get stung repeatedly by a Japanese Hornet or be bitten once by a Black Widow spider

Deadly Anthropods

get stung repeatedly by a Japanese Hornet

Multiple hornet stings are agonizing but unlikely to kill a healthy adult; a Black Widow bite carries a real risk of death from a single encounter.
You can fight back against a hornet or escape mid-attack, whereas once the spider has bitten you, the venom is already in your system.

be bitten once by a Black Widow spider

Medical data shows Black Widow bites are rarely fatal — most victims recover with minimal treatment, and the death rate with proper care is very low.
Japanese Hornets cause massive tissue destruction with repeated stings; a single spider bite is a contained, one-time injury, not an ongoing assault.
Black Widow venom causes localized symptoms like muscle aches and nausea, while Japanese Hornets can trigger anaphylactic shock and destroy tissue with every additional sting.