Celtic Sheepskin - what is the difference between the 'classic' boots and the 'celt sheepskin' ones?

[filetheflightoffancy]

Have been looking for some new boots for this winter and have come across the Celtic Sheepskin website after recommendations on here.

However, apart from a bit of leather trim at the top and a black sole on all of the 'sheepskin' boots, I cannot see any difference between these two styles, yet one is 20 quid cheaper than the other.

Can anyone enlighten me, or is it just those very subtle differences?

Thank you!