writer - Export to pdf - loss in formatting

While exporting a docx to pdf using writer, table borders look different. Attached screenshots of both docx and pdf.
I am in windows 8, libreoffice 5.2.4.2. Is there a way to get full fidelity?

Writer: https://postimg.org/image/uq0sczm7l/

Pdf: https://postimg.org/image/3l5qs2kuv/

Regards,
Rajesh