The performance between the DF3 and DF3i is identical; the upgrade is entirely about personal preference for a softer feel and a more muted, dampened sound.
Their scorecard
Feel & roll: 3/5 — Firm and metallic
Impact Sound: High-pitched ping/5
What they rate
Consistent Lie Angle Balance technology across both models
DF3i successfully eliminates the metallic ping
High performance on pressure putting tests
What they don’t
Very difficult to tell the difference in a blind feel test
Upgrade is largely aesthetic/auditory rather than performance-based
The performance between the DF3 and DF3i is identical; the upgrade is entirely about personal preference for a softer feel and a more muted, dampened sound.
Consistent Lie Angle Balance technology across both models