This is true, the FKS 180 features the Dual Action Race toe, full metal construction, whilst the FKS140/Pivot 140 features the Dual Action toe, which I beleive is plastic in construction. As far as I am aware depite the differing construction, both toe pieces feature 180degree multi directional release. However the Dual Action toe on the FKS140 features 45mm lateral travel, compared to the 40mm of the FKS180. Also the Dual Action (FKS140) toes features 4 points of contact, where as the Dual Action Race of the FKS180 features 7 points of contact.
nb/ OP the FKS140 features the toe (Dual Action) as the Axial2 series.
Hope this helps, Joey