Don't know if they are the same as the recent Koala tactiles, but if they are, here's my take vs T1s. T1s have a nice, medium, rounded bump. They remind me of a more rounded Zealio V2. (less of a hump to overcome at the top). Koalas, and I assume these new tactiles in nylon housings, are somewhere between a Zealio V2 and a Holy Panda in terms of tactility. I don't know why they are different, but they are, indeed. Even with the same spring and filmed. So, if you like lighter tactility, go with T1s. If you like higher tactility, go with these.
However, they all need films. Same for linears. My personal pick is stock T1s with films and Koalas with 72-80g springs + films. Haven't found a bad durock switch yet, keeping in mind the extra time and expense for having to add films to all of them.