There are big differences between the widely available budget masking tape — which can be picked up for less than £1 a roll — and the far more expensive professional versions, such as Frog Tape.
As well as its paint-blocking properties, Frog Tape is also a winner for its lower tack level, allowing it to be used where strong adhesion could damage the surface. It’s worth noting that one of the main properties of all budget masking tapes is their very high adhesion level — this can be damaging, particularly to varnished surfaces.
Each has its place: always have both.