they are all different and it depends on what your after. also just because a bar is thicker, its not necessarily stiffer, they might be a solid or hollow bar or different material etc.
a point of note for bars though.
the thicker the front bar the more understeer.
The thicker the rear bar the less understeer thus closer to oversteer.
what ever you go for id say choose an adjustable kit, because if you dont like the balance you can adjust it very easily to make itmore neutral or more aggressive.
On my vRS i had the eibach front and rears, they worked best set on front -soft, and rear -stiff. i was however considering fitting a stiffer rear bar though as i prefer the back to be that tad looser to get the nose into a corner, understeer is for gays
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i havent voted on the choices you have as id go for the whiteline 24mm adjustable front and rear bars. you can see they test their kit on cars before releasing. i get the idea alot of other companies get the std ARBs and merely make them stiffer. and the bars are matched closer together. its the rear bar which is the main issue on these cars.
however from the list i'd be goinf for the autotech 25mms, or neuspeed 25mms as long as they are adjustable