I just saw that it was 4x108, is there a difference between the two?

95 zetec no engine mods
20% tint, limo strip
alpine cda7876, alpine dddrive components ddc-r17h, 2 kicker 12L7 in a ported box facing forward and sealed from the trunk air space, zapco limited edition z600 (2) getting the 3-way component set