“Where Did Ghamidi Sahib Mention His Ikhtilaf With Maulana Wahiduddin Khan?”
There is no single place where all such disagreements have been gathered. It can be best studied via comparative study between the two scholars. Here is one instance where Ghamidi Sahab has expressed his disagreement explicitly. Please refer to the video below from 1:28:28 to 1:32:26 https://youtu.be/UrDM1yMBpME?t=5308