大きい vs. 大きな --- Any difference?

[acm2010]

You can use both 大きい and 大きな before nouns, is there any difference in meanings, or a reason to choose one other the other?

For example
大きい花
大きな花

[Leebo]

Here’s an article on that

https://www.imabi.net/adnominaladjectives.htm

[acm2010]

Looking at the words that are marked as adj-pn, is it true that this only applies to a very limited number of words where this grammar can appear?

[Leebo]

Yeah, there are not many い adjectives that have a な counterpart.