So, first thing: JR RS is absolutely right. There are two Eibach Pro-Kits for the Superb, one for the liftback and one for the wagon, with the numbers as he says. I bought the wagon version (for my liftback), despite the retailer saying it was specifically for the lift back. So something to be aware of. The rear springs on the wagon version are 5mm higher than the front springs.
However, that mistake turned out to be a blessing, at least for my tastes.
(All subsequent measurements in my post are hub to guard)
The Superb AWD standard ride height is 380mm, both front and rear. A major issue in my eyes is that the body shape design, when both front and rear ride heights are the same, has a very definite 'nose-down' stance and the back end of the vehicle looks like it's sticking up in the air. If you allow your eye to follow the bottom sill line between the front and rear wheels, it is not level with the ground, with a pronounced slant towards the front. This is a design aesthetic by the Skoda designers and it may not bother some people, but it is something I have never liked. I prefer a car to have a flatter stance.
The front springs (F11-85-042-03-FA) in the Pro-Kit deliver a front height of 350mm. The rear springs from the Pro-Kit delivers also 350mm for the lift back or 355mm if you buy the wagon version.
In my opinion, 350mm at the front is too aggressive. At least here in SA, crossing spoon drains and even getting up some ramps, it is very difficult to avoid scraping the front underside of the vehicle. I realise this is a personal view and many others may really like that ride height, and that's perfectly fine. I don't believe it fully suits this type of vehicle and it certainly has practicality issues.
As I said earlier I also mixed this with wagon springs (on my liftback, because I made the mistake of buying the wrong set, d'oh!), so the rear was sitting at 355mm, and just further accentuating the nose-down, bum-up stance of the vehicle overall. However, I actually really like the rear ride height of the vehicle with those rear springs and I am glad I didn't get the correct kit, as I think 355mm (rather than 350mm) looks perfect. Again, personal opinion.
After contacting Eibach Australia and discussing it, I resolved this by fitting revised front springs (F11-85-043-02-FA) which have been discussed in the forum here. I left the existing Eibach rear springs in place.
This has raised the front to 370mm. The rear remains at 355mm. I am now happy with the result as it achieves two outcomes: first the front definitely has more clearance and is more practical to drive in everyday situations. Second it has removed the pronounced nose-down stance the vehicle had before and made it sit flatter overall (no more rear end sticking up). Handling changes are almost imperceptible at speed and slightly more compliant over speed humps at slow speed.
The gap between tyre and guard is now slightly wider on the front compared to the rear which may play with some people's OCD. But as you can see from the pic above, you really have to be a train spotter to notice and I happily take that given the vehicle now sits flatter in stance overall.
As MartiniB states above, you can order separately rather than as a kit, and in hindsight I would have done that from the start.