Callaway ERC Soft vs Mizuno RB 566
Which is right for your game?
Callaway
ERC Soft
senior urethane
Compression
60 (Soft)
0 120
Mizuno
RB 566
value ionomer
Compression
70 (Mid)
0 120
Spec comparison
Spec
ERC Soft
RB 566
Compression
60
70
Cover
urethane
ionomer
Spin
mid
low-mid
Feel
very soft
soft-mid
Construction
3-piece
2-piece
Category
senior
value
Swing Speed
75–95 mph
75–98 mph
Price tier
Mid-Range
Budget
Choose the ERC Soft if…
- ✓ You prioritize short game spin and greenside control
- ✓ You have a slower swing speed or prefer a softer feel
- ✓ Extremely soft urethane ball with Triple Track alignment system
Choose the RB 566 if…
- ✓ You swing over 95 mph and want firmer feedback
- ✓ You want strong performance without tour pricing
- ✓ Budget matters — the RB 566 costs less per dozen
- ✓ Entry-level Mizuno with 566-dimple consistent flight