Another issue with BLOBs and SQL Mobile

I just received a kbAlertz with this interesting title:

An .sdf database file in SQL Server Mobile is larger than the same .sdf database file in SQL Server CE 2.0 when you use the ntext data type or the image data type

SQL Mobile is a rewrite, not an upgrade of the SQL CE 2.0 code, so one should expect some differences in behavior. I am collecting a list of these, both high and low-level and will publish them soon.