Tough Dog shocks: self regulating "Ralph" or big bore manual adjustable?

[SteveS]

I plan to go for some Tough Dog shocks to replace the OMEs that are on the truck presently. The choice offered (2" lift) is the big bore externally adjustable

http://www.euro4x4parts.com/parts/utx1015-2187_shock_absorber_tough_dog_45_mm_adjustable.html

or the "Ralph" model with 53mm and velocity sensitive valving

http://www.toughdog.com.au/products/shock-absorbers/53mm-ralph/

Can anyone advise on the relative benefits/problems associated with the different design approaches of these two models. I understand the benefits of big bore.....it is more the velocity valving vs manual adjustment

There is nothing in the price it seems