The duo were on target as the Pilgrims overturned a 2-0 half-time deficit at Brentwood Town.
Floyd and Vince struck after the break to seal a deserved 2-2 draw for the Pilgrims.
Boston (4-3-3): Harry Payne; James Gordon (Peter Evison 46), Kofi Ross, Daniel Moulds, Jack McCallum; Jack Dykes, Harry Vince, Oli Drummond; Scott Floyd, Tinashe Chavundura, Jordan Tate (George Hobbins 46).