I think it depends on when you were there. I believe, eventually, in later years, they all ended up being called workshops, but when I was there, there was a differentiation in terms.
A propheet was an overnight experience. Roughly 24 hours. There were seven of them, and you went through them in different families (read: phases). After you completed the propheets, you went through two workshops. One which was three days long, the other six.
Voyageurs was the first family, (3+ months) and the accompanying propheet was the Truth.
Discovery was the second, (3+ months) and it's propheet was the Childrens'.
Quest was the third, (6+ months) and it had two propheets. First the Brothers Keeper, and second the Dreams.
Challenge was the fourth, (6+ months) and it also had two propheets. First the I Want To Live, and second the Values.
New Horizons was the fifth, (I think it was maybe 4-5 months) and it had the Imagine propheet. This was the last propheet you go through.
Then, also in NH, you go through your first workshop several months after your Imagine... the I & Me. That was three days long.
Summit is the last family (also, I think, around 4-5 months) This is when you go through the Summit workshop, which is 6 days long. The Summit is essentially Lifespring. Mel bought the copyright. The only difference is he added a day of his own crap.
The other difference between a propheet and a workshop, besides the length of time you are in the experience, and at what point during your internment you go through them, is that propheets were named so because a passage from Khalil Ghibran's "The Prophet" is read in each propheet. We were told that the point was to take the words of the prophet and put "feet" on them, i.e. act upon them, hence the name "propheet". :roll: The workshops, however, do not reference the Prophet.