go for the carbon ti one i know it's more expensive but it's a miles better brake . it has all titanium bolts and a carbon lever blade which is awsome i use one on the rear and it's so good
Edit: i realised you ride a mod mate 180mm would be to big and the 190 only fits certain forks you need a 160mm they are still very powerful
also there is no differnce between the tarty brake and the standard one apart from the logo and the black body
link to the brake
www.tartybikes.co.uk/product.php?product_id=10304&category_id=12