I own the 4 and had the 3. Stock, the 4 is much quieter, slightly more efficient and very comfortable. I would not call it loud by any account, though louder than any DM or other spool.
ANTIDOTE Twister LV1
Pumphaus OC Phantom
VSC Green/Silver Washed Phantom
Palmers Brass N' Wood 1K Blazer
Twister Ion Pump
Saved for Twister Sniper coming soon!
"I Fight YOU!!! Pew Pew!"