dingusI agree with this, but a pair of Full Tilts or Dalbelloes will be more comfortable in park conditions (hard landings, shin bang, etc) than lets say a pair of racing Langes or even a just a "all-mountain" boot. But what is more important that what boot you get is what flex you get, you have to get a flex that is in your comfort and skill level. Your proper flex is usually determined on 3 factors; Weight, Style (Park, Racing, All-Mountain, etc), and Aggressiveness (Beginner to Advanced). Dalbello should have a table on their site saying what flex you need according to those categories.
You need to remember that an original Full Tilt is a Raichle Flexon, a race boot from 1980. This is no slight to the Full Tilt, but it just goes to show that ski boots work in different disciplines as long as
they are the right fit and flex for you. In my opinion, there is nothing inherently better in the design of a Full Tilt than a Lange or vice versa.
In regards to flex, the right flex has almost nothing to do with your skiing style but instead with your weight, height, strength, and ankle range of motion. If you select a boot flex on those listed criteria, then it really doesn't matter if you are going to ski in the park or spend your time ripping groomers or skiing the trees. Your boot matches you and your biomechanics, not where you ski on the mountain.