Spindle Gouge's are detailing tools used on between- centre work, where the grain is running parallel to the lathe bed. Create beads or coves on table legs, candle sticks etc.
Parting Tool's are used to part the finished project off from the waste material, the parallel sides make for a rigid tool that handles well. The ⅛" – 3mm tool reduces the amount of waste, vital if using an expensive wood. It also makes for a fine detailing tool, e.g. beads and fillets.