The most simple way to differentiate between a regular Session ID and a blinded Session ID is by looking at the beginning of the ID.
A regular Session ID begins with 05.
Example: 056fdf36e5a825afdaa73762daf5873d18ad7a230a8ee9dbf1e0b7d41e2322cc4a
A blinded Session ID begins with 15.
Example: 156fdf36e5a825afdaa73762daf5873d18ad7a230a8ee9dbf1e0b7d41e2322cc4a