FYI, the letter spacing or kerning one gets when converting from docx to PDF is different between Aspose and native Word PDF generation.
Thanks for your inquiry. I have tested the scenario and have managed to reproduce the same issue at my side. For the sake of correction, I have logged this problem in our issue tracking system as WORDSNET-12136. I have linked this forum thread to the same issue and you will be notified via this forum thread once this issue is resolved.
We apologize for your inconvenience.