Philipat, if the same type of track were available from each of these two manufacturers, I would say that in terms of detail and locking pin retention, I would give Impact the nod. The details on their tracks just seem to look a little more "crisp" or "scale" than the same track from KK. But neither one is bad - like I said; I have several sets of each, and no regrets at all. We are very fortunate in this hobby to even have a choice.

Some of it boils down to what track you're looking for; as that may lock you into one or the other. If you wanted the Panzer III/IV Winterketten or Ostketten tracks, or the late-war single-shoe KT tracks; you'd have to go with Impact. On the other hand, Impact doesn't make some things that Kenny Kong does, (like track for the 1/15 Bandai Tiger, or KT transport track. Most people may not care about that last one, but it made a world of difference to me when I was trying to find suitable tracks for a Panther II - for which, I also used Impact's 18-tooth sprockets).

I don't have any experience with Asiatam tracks, but would be interested in hearing from others about them. I have had mixed experiences with some of their other products. Their metal KV hulls and roadwheels are really well made - you can tell that a lot of effort went into them. I have a couple of their Panzer III/Stug IIII hulls, and really liked them until the roadwheel rubber started to crack and fall apart. I don't know if the Mato rubber tires will fit the Asiatam hubs; but that might be a fix (if Mato is willing to sell the rubber tires separately. I haven't checked into that yet). I also got a couple of Asiatam gearboxes, because they were low-profile and geared lower than Tamiya gearboxes. The final-drive shaft on their gearboxes is made of brass, and I managed to bend one of them. I don't know if it was all the tension on it from the metal tracks or what; but that shaft really needs to be made from something stronger than brass, (the gearboxes from both Impact and Tamiya have steel shafts there).