The lower range wrenches are more expensive because they need to be more accurate 2-10Nm. They are what you need for all the commonly tweaked stuff except crank bolts and bottom brackets. There is no reason to pay a premium for a Park tools wrench. That Draper wrench is 30-200Nm so will only really be of use for your cranks. Carbon stems, seatclamps, etc require around a 2-10Nm wrench.. the 2-24Nm Giant looks ok if a little expensive.
The lower range wrenches are more expensive because they need to be more accurate 2-10Nm. They are what you need for all the commonly tweaked stuff except crank bolts and bottom brackets. There is no reason to pay a premium for a Park tools wrench. That Draper wrench is 30-200Nm so will only really be of use for your cranks. Carbon stems, seatclamps, etc require around a 2-10Nm wrench.. the 2-24Nm Giant looks ok if a little expensive.