I’ve just switched to helix platinum xh from dna platinum xh for backhand and I was very disappointed at first. It was so bad I gave up and swapped sides which is when I tried the helix for forehand, and it suddenly made a lot more sense.
It has more spin, less linearity, and slightly thicker topsheet than dna platinum so for most peoples style it should be a big upgrade for the forehand but quite a downgrade for the backhand. I personally have a big brush loop swing on my forehand and more of a block or concise drive on my backhand.
The dna platinum is much much better than the helix platinum for blocking and backhand drives.
I think in the DNA, the rubber topsheet is thinner and the sponge is thicker, so it has a bit of a soft impact but then incredible raw power (without being bouncy). It has incredible speed and spin with small swings where you can press down on the top of the ball, which is harder to do on longer swings I.e. forehand…
On the helix, they made the topsheet more thick (ever so slightly), and the sponge back down to 2.2mm (like a tenergy). So, unless you have a super active block, it is worse than the DNA on the “small linear control shots” such as for driving and blocking. But for the attacking forehand and countertop the helix is a very good rubber and I can see now why Truls said he made the switch because his game has evolved... Especially also as it is slightly more grippy than the DNA platinum.