why do i get so dry and dont know what to say when i meet someone that matches my energy?

So about me i’d say im a funny person, very charismatic, well spoken, funny, a lot of people say im fun to be with yk, people even told me i should start streaming cause of my personality, im assuming its because im so random, im autistic and weird, but everyone is weird in their own way you know, they just dont show it directly they wait till they’re comfortable with a certain someone to show that side of them yk. but with me im very open so i show that side immediately like that even when meeting someone the first time, i can start any conversation with a stranger and keep it going, no social anxiety as you’d say, but when it comes to speaking to girls, they never match my personality but i can be able to hold a conversation with them for hours and hours, ive been told im a good conversationalist, and im very comfortable, and when i hang out with a girl its always fun, but once in a blue moon i be encountering girls who are exactly like me, but when me nd those type of girls talk, i get so nervous i dont know what to say, and they act exactly like me, and im always like “why am i nervous why cant i think of anything to say we literally have the same personality and vibe” i dont know is there a scientific reason to this? like when i meet someone who matches my humor and personality i freeze up and dont know what to say, but with people that are the opposite im the charismatic devil