In my humble opinion using the event structure gives you much more flexiblity i.e you could change the amount you want to increment the control by, put limits on it, change colors, etc.
Also it makes your code a lot easier to read. Everything is in the block diagram not buried somewhere in the property of the control. You are also not limited by what NI decides to give you.
My $.02, or maybe $0.01. If I switch to euros do I get $.03?
Dan