RDRP LRC rear mounts for 210

[TonyM]

I recently bought the RDRP low roll centre rear mounts for my 210. The official blurb states:-

'The LRC suspension mounts lower the vehicle's rear roll centre by 2mm in order to improve handling on medium to low-grip surfaces . . .'

I'm confused as other sources say use a High Roll Centre for more traction e.g.TD's info on the 410 V3 inserts states:-

'Using the +2 block will raise the roll centre height making the car 'roll' more at the rear end, which will help to generate grip on low traction surfaces . . .'

So what is it - LRC or HRC for low grip surfaces?