Small words, big meanings: "miniature" vs. "bitsy"

What is similar?
Both "miniature" and "bitsy" describe something that is very small or tiny in size. Both words can be used as adjectives to indicate smallness.
What is different?
"Miniature" is a formal term that can function as both an adjective and a noun, often referring to a small-scale replica or model. "Bitsy" is an informal, colloquial adjective meaning extremely small, and is less commonly used. "Miniature" is suitable for formal contexts, whereas "bitsy" is more casual and may not be widely recognized.
Which one is more common?

Examples of usage
Miniature- She collects miniature ships made of wood.
- The museum displayed a miniature version of the ancient city.
- He gave her a miniature rose as a gift.
- The newborn kitten was so bitsy it could fit in my palm.
- She wore a bitsy dress perfect for the summer heat.
- The café served bitsy cups of espresso.