Product Comparison Problem

-- HikaShop version -- : 2.6.1
-- Joomla version -- : 3.5
-- PHP version -- : 5.4.45

How can we setup the comparison table to compare the spec that we want? do we need to make all these info in custom field?

example, we would like to compare the spec of laptop

cpu
ram
capacity
battery
graphic
size
os

if we enter all these in table form of description , it do not compare it at all