Standard Edition
60 US$ ~= 54.95 CHF before taxes
54.95 + (54.95 x 7.7 / 100) ~= 59.20 CHF after taxes
74 - 59.20 = 14.80 CHF price difference after taxes
14.80 / 59.20 * 100 = +25% price variation rate after taxes
Deluxe Edition
79.99 US$ ~= 73.25 CHF before taxes
73.25 + (73.25 x 7.7 / 100) ~= 78.90 CHF after taxes
99 - 78.90 = 20.10 CHF price difference after taxes
20.10 / 78.90 * 100 = +25.47% price variation rate after taxes
I do not even know if the responsible actually pays the 7.7% tax in Switzerland 
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