Ami has met Klaus at this point, buuuut since that thread's still in progress, it's unclear what her impression of him is. The "happy sap," though, she does have an impression of.

"They are alike, though," she insists, pouting. "Just 'cause you give it a cute nickname doesn't make it not a drug. Happy sap, wacky tobaccky, moon rocks... 'Sall the same."

And yeah, she knows they are technically different substances. But in her mind, they're all equally bound up with memories of Dani, so they might as well be equivalent.