In reply to airborne:
Yes, it seems both companies are equally highly regarded, I'd give Jagged Globe the edge in apparent popularity based on the responses I have received.
I would certainly be interested to hear whether experienced climbers thought there was any merit of one course over the other in terms of content based on the descriptions on the websites. Equally is there anything missing from either course that should be taught/would be beneficial to learn?
Jagged Globe;
On completion of the course, you will have learnt to:
Consider factors affecting route selection (for example, team composition, weather and snow conditions).
Recognise and avoid hazards in the alpine environment.
Contribute to decision-making in the alpine environment and in an expedition context.
Select appropriate clothing and equipment (crampons, ice axes, boots).
Be a competent member of a rope team for travelling across a glacier.
Take coils and move together as a roped team in a variety of terrain.
Use ice axe and crampons.
Identify and place reliable snow, ice and rock anchors.
Participate in a crevasse rescue scenario.
Rock climb (belaying, including holding a fall).
Use Alpine huts.
Climb routes graded Alpine F to PD.
ISM:
As this course is aimed at people new to alpine mountaineering, we cover all of the basic climbing and alpine skills, including:
Introduction to basic climbing equipment.
Attaching to the rope and other climbing knots.
Basic movement techniques over rock.
Abseiling and prussiking.
Belaying and protection techniques on rock and ice (both as leader and second).
Use of crampons and ice axe on snow and ice.
Taking coils and moving together with the rope (both as leader and second).
Short rope techniques for different types of alpine terrain (both as leader and second).
Safe glacier travel and crevasse rescue (both as rescuer and 'victim').
Constructing snow and ice belays and descending on snow and ice.
Navigation and interpretation of maps and guidebook.
Preparation and selection of climbing equipment.
Alpine huts and the £alpine start£.
One thing I had noticed was the guide student ratio, for Jagged Globe this is '1 day at 1:6, 5 days at 1:4 - 1:6 maximum' whilst ISM is '4:1'.
Post edited at 20:35