Wall and ceiling textures are applied by individuals at different times using different techniques and different thicknesses of product and different tools. You will not match what you have perfectly.
Just last week there was a hard-headed woman here that insisted she wanted someone to tell her the name of her texture pattern so she could duplicate it. She just couldn't/wouldn't get it through her thick head that it doesn't work like that. She said someone told her her pattern was called "rosebud" and she thought it was a pattern that she could go to the store and ask for the tool to do the rosebud pattern.
Texturing is like fingerprints, there are no two the same.
The texture in the above photo is not a standard orange peel and it is not a standard knock down. I agree it looks as if it has been rolled with a paint roller.
You guys are just going to have to get close and get happy.