Lay back is just the denotation for how a roll is finished. In Euro rolling there are several different rolls that can be finished as a lay back roll. In Greenland rolling each roll is counted and denoted by several factors of the roll…not by just the finish position. There is quit a difference as to how rolling is usually taught between Euro and Greenland.
Greenland rolling is usually taught from the finish first, so teaching a Balance brace first is a way to perfect the finish of all Greenland rolls that finish as a lay back roll. If a student/kayak combination is able to Balance Brace, it’ like cheating and makes the teach/learning much easier.
If factors are against a certain combination of body and kayak , ability to Balance Brace…then sculling is the alternative , in order to practice the end of the roll first.
If a roll is going to fail…it always fails at the end. {doesn’t matter if it is Greenland or Euro} ALWAYS AT THE END.
The 2 most common rolls taught first to Greenland rollers are either the Angel/Butterfly or the extended paddle rear deck finishing sweep roll. {usually known as standard Greenland Roll}
forward finish rolls and hand and sculling rolls are usually the last ones taught.
In Euro rolling the order of rolls taught is usually about the same. Rear deck recovery first , front deck recovery last. {The exception to this is that some WW kayaks are easier to roll with a front deck recovery, so with those kayaks sometimes front deck recover is taught first} {also some instructor insist on the paddler finishing sitting up right an want to skip any other steps to achieve this so teach that from the beginning}
There is not just one roll for a certain paddle. If paddling with a Euro and rolling with the same, then if your instructor only knows how to teach a certain roll…that is what they will teach and the student will come to think of that as THE EURO ROLL. It could be a pure C 2 C or a sweep C 2 C or a slash/green water roll or a screw roll etc etc etc. Rarely if ever taught is the Angle/Butterfly roll for Euro. if taught it would be a forward finish Angel/Butterfly
With Greenland rolling all rear deck recovery rolls are based on the Balance Brace for the finish and all front deck recovery rolls are based on chest sculling.
Greenland rolling instructors tend to teach with a mind set that the student is beginning a personal journey of learning a veritable plethora of rolls where as many Euro instructors follow the path of teaching you a roll.
Good Luck and Best Wishes
Roy