No, they are not the same. I think the only common part is the vertical stab and *maybe* the elevators. The h-stab and rudder are definitely different. This is for the -7.
On the -9, EVERYTHING is different from the -8. The rudder from the 9 and 7 kits are the same.
As an instructor at Alexander Tech Center on the Tail kit program I can tell you;
The 8 and 7 elevators are the same. The rudder is only for the 8. The horiz. is the same between the 7and 8 except for the skins and two angles. the vertical is the same between the 7, 8, and 9 except the 9 skin is thinner.