The Eye Lifter and this product are similar in formula, but designed for use with different applicators for different times of the day. The Silk Eye Serum is designed as a more water-based formula that can roll out of a steel eye roller tube. This requires less product to apply, and provides more of a cooling effect. It's designed for use during the day and in the morning.
The Eye Lifter is designed as a thicker, more hydrating cream formula with a pump applicator. This is for use in the evening before bed as an eye night cream.