The 125 is better as a snowshoe substitute, more maneuverable, better in thick woods and brush, lighter, and a little better grip. The 125 is also easier to control and use for those unfamiliar with skis.
Both sizes turn well with the 125 being a bit easier due to the length, but also a bit less stable at speed.
For general use and as a snowshoe substitute the 125 works best. The length affects the boot/binding you use as well, with the 125 being easier to ski with a light boot or the universal binding.
