If i remember correctly,
Originally Hsp files were created by Navteq and FSP by TeleAtlas (or TOMTOM), they were one of the same thing.
When they were first released you could only use HSP with Navteq maps and FSP with TeleAtlas maps.
There was a time when FSP data was considered superior to the HSP data but i think it veries from country to country, much like maps.
Things have moved on alot since then, so i'm not sure how it all plays out now.
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