If you already have a pricelist and plan to use the same price zones but different prices, you can copy the original pricelist and then just change the pricelists on the new one.
Click on "add" under "pricelists" under the "play options" column
In the "description" field, fill in the name you want for the new pricelist and tick the box for "Copy data from other pricelist".
From the drop down meny that will appear choose the pricelist that you want to copy from and click "save".
This option is especially useful when you want, for example, to establish an ongoing discount for a reoccurring event (i.e. every Wednesday). In cases like these, you can copy the pricelist and add the discount as a discount on the relevant price zone.