Epoxy XTR vs. Fiberglass?

Hey,
Tried out my friend's epoxy xtr board yesterday and kind of liked it. Can you explain the differences between epoxy xtr and fiberglass and which you prefer? Also, i take it epoxy xtr is related to normal epoxy surftech-like boards? It seems completely different.
Tried out my friend's epoxy xtr board yesterday and kind of liked it. Can you explain the differences between epoxy xtr and fiberglass and which you prefer? Also, i take it epoxy xtr is related to normal epoxy surftech-like boards? It seems completely different.