Infantilised vs. Infantilized: What's the Difference?

Infantilised and Infantilized Definitions
Infantilised
Simple past tense and past participle of infantilise
Infantilized
To treat or condescend to as if still a young child
"The Victorian physician infantilized his patient" (Judith Moore).
Infantilized
To reduce to an infantile state or condition
"It creates a crisis that infantilizes them—causes grown men to squabble like kids about trivial things" (New Yorker).
Infantilized
Simple past tense and past participle of infantilize