What is the difference between "special" and "certain" here?

Question

The special requirements imposed on marketing, which is caught between the conflicting priorities of customer wishes, competitive ability, social and economic framework conditions and the company’s capabilities, lead to certain requirements being placed on the marketing organization.

Answer 1

Special requirements الزامات خاص

Certain requirements الزامات مشخص

Answer 2

special = خاص

certain = معینی / برخی