Canson PhotoSatin is not even close IMO. Ilford Pearl has much more distinct "pearling", while PhotoSatin is smoother, with very fine texture - comparing to Fuji DP II c-print types, Ilford looks like Lustre, and Canson like Matte surface.
After the end of production of lamented Canon Photo Glacier/HW Satin I had switched to Tecco Production Semiglossy 300gsm that has similar "pearling" to both HW Satin and Ilford Pearl.