The main unique characteristics of Dr. Web Secure is high quality of detection and removal which important on the effectiveness of a product. Not surprise where removal feature is capable on sophisticated threats.
Meanwhile on the other hand Emsisoft AM have robust detection with fine tune on removal capabilities, this product mainly focus on prevention status. Although they offer Emergency Kit which can also remove complex threats.
For features: Emsisoft proven already the functionality of Cloud and BB whereas the newly Dr.Web Katana is in the room of improvements based on observance of users.