Both irons are top-tier game-improvement options offering nearly identical feel and confidence at address. The TaylorMade RSi1 hits noticeably farther primarily due to its stronger 26.5° loft and longer shaft compared to the Titleist AP1's traditional 29° 6-iron loft.
Their scorecard
Forgiveness: 4/5
Workability: 3/5
Feel: 4/5
Distance: 5/5 — 26.5° loft provides extra distance
What they rate
Both heads offer high forgiveness and confidence-inspiring blade lengths
RSi1 delivers extra carry distance right out of the box
AP1 provides higher spin and traditional loft gapping
What they don’t
Loft differences (26.5° vs 29°) make direct number-to-number comparisons misleading
RSi1's face slot cosmetics may not appeal to classic purists
Both irons are top-tier game-improvement options offering nearly identical feel and confidence at address. The TaylorMade RSi1 hits noticeably farther primarily due to its stronger 26.5° loft and longer shaft compared to the Titleist AP1's traditional 29° 6-iron loft.
Both heads offer high forgiveness and confidence-inspiring blade lengths
RSi1 delivers extra carry distance right out of the box