Sometimes fibreoptic is eathernet.
Assuming you mean TP Ethernet compared to FO Ethernet, you get:
Speed - No difference, both can potentially run at either 10, 100 or 1000mbps.
Cost, TP is cheaper
Installation, TP is easier
Noise immunity, FO is just so much better, but STP or UTP may be good enough.
Distance, TP max 100m, FO max about 3km.
Doug