Plectrum generally gives sharper attack.
There are some songs in my set that I recorded with a plectrum but, since suffering a neck injury that has caused a permanent numbness in my right hand and arm I find I no longer have the grip strength to hold a plectrum.
Many of the ding-diggadigga-ding rhythms that lend themselves so well to pick playing can be tricky to play with fingers, not so much for the speed (although once you get to 140ish bpm ding-diggadigga-ding gets tricky) but the attack. Getting such a short sharp attack with fingers is nigh on impossible.