You would have to be more specific.
Who's 'touring' cam?
Anyone can make up a cam and call it touring. The question is what is the timing and height of the lobes? Is this a regrind or one of new cams you can buy?
A combination of modern fuels and a better understanding of the combustion process allows for more power and efficiency with different lift and timing. The changes can change how the A engine sounds and performs. Also you may need to add compression to be more effective.
When changing cams you also need to know which is the correct size tappet head. With the change in lobe shape you may need a larger head or it wears the cam lobes.
You can learn a lot more by visiting Vince Falter's website. He, as usual, does a great page on cams.
Stipe cam comparisons