In reply to Climbthatpitch:
Thats funny, Ive had the opposite problem between the two brands, a Garmin takes foreveerrrrr to lock on GPS - but my Suunto Trainer locks on almost immediately... hence me leaning towards Suunto.
The Suunto app side is not as powerful as Garmins 'Connect' app however I feel that the Suunto UX on the watch is slightly better and more intuitive.
I would say that if you want to compare them, its like Apple (Suunto) and Android (Garmin).. make of that what you will!