I had a SME V with Dyna XX2m1 and later on XX2m2. Both sounded beter with silicon damping. The sound is more controlled, with less stray noises and quieter between notes.
Even when I moved on from SME V to Basis Vector 4, silicon damping did bring a more precise sound which I prefer. By precise i mean no stray ringing or artificial notes extension caused by vibrations and resonance.