Quite old thread....
Let's be fair, the Boost pig tails are extremely fiddly, I hate it. I've got at least three race lines and the ends are always thicker for durability and handling.
Boost pigtails now are almost worn out. Which also opens the question of stretching of bridles on Boost: viewtopic.php?f=1&t=2398296
However, we don't know the Edge bridles measurement so can't say anything about that. Pigtails on Edge are still immaculate after much more abuse.
Because the Edge has thicker LE I see this as a benefit for durability, coz of lower LE pressure. Boost will take more pressure, thinner LE, slam this into the water and durability goes in drain. Not that I slam both kites anyway
The Boost1 loops better, but also flutters more in 9m size. Which is super annoying.
The Boost will send you better in 9m size, it will also glide better which sometimes is quite unexpected. Talking 25-40m plus. The Edge does not do that. Both kites hunt on window edge, no real difference here, but thinner LE goes a bit better upwind. Both are very precise kites, exactly the same bar pressure in same sizes, tip end settings.
The Edge reverse relaunch is inferior. In bigger sizes would be even worse. Boost does that pretty well.
Boost1 tho has supper annoying problem with deflation, which is, the strut valve is to close to LE hence the rubber tube is bent every time I pack the kite and the air does not go out. None of this with Edges. Plus, the Edge inflate valve is immaculate, FS is not. Superficial small things I know. But, the Boost price IS high, so I do not expect small issues like ie almost impossible to access LE valve when the kite is reversed on a grass to top up the air. Grrrrrr....
The Boosts are quite rare kites in AU, which is a shame. But, the prices in EU I would never pay, which is almost a niche market...