The biggest difference is how consistently testers rated forgiveness and launch. Reviewers agree the ZXi4 is forgiving, with off-centre strikes losing little distance and staying on line, and most saw a high flight. Opinions on the ZX4 Mk II split: forgiveness ranged from moderate to strong, and some testers found the long irons hard to get up.
On paper the two are nearly the same. Both have a 28.5° 7-iron with a 62° lie and 10° of bounce, and the ZXi4 is slightly longer at about 37.25 inches against 37 inches. Reviewers agreed the ZX4 Mk II feels solid and soft on centre strikes. Reports on the ZXi4's feel ranged from soft to firm.
Choose the SRIXON ZX4 Mk II Irons if…
you're a mid handicapper with a moderate swing speed who wants distance from a fairly compact head with a soft centre-strike feel, or you want strong long irons to pair with ZX5 or ZX7 irons in a combo set.
Choose the SRIXON ZXi4 Irons if…
you're a mid-to-high handicapper who mainly wants forgiveness on mishits and a high, straight flight, with the option of adding ZXi5 short irons for more stopping power.
Common questions
- Which is more forgiving?
- The ZXi4. Testers agree it loses little distance and holds its line on off-centre strikes. Ratings for the ZX4 Mk II ranged from moderate to strong, and toe strikes felt noticeably worse.
- Which launches higher?
- Most ZXi4 testers saw a high flight. On the ZX4 Mk II, opinions split, and some found the flight low and the long irons hard to launch.
- Which has the more consistent feel?
- The ZX4 Mk II. Most testers described a solid, soft feel on centre strikes. ZXi4 reviews ranged from soft and lively to firm and solid, so it's worth hitting before you buy.
Written by golfclubase with AI from our summaries of published reviews and test videos and the makers' published specs (Oct 25, 2026).