Chobham in its various incarnations is by far the most effective advanced armour system. It will even keep out APFSDS rounds. Some of the reactive armour proved pretty special in its later forms but Fin would still make a hole.
A Challenger in Iraq rolled into a ditch and overturned. The baddies hit it multiple times (16-18) in the upturned belly with rpg's. When recovery teams got there and extracted the crew there were no injuries from any of the weapon strikes.
The Dorchester variant has had some teething issues however and appears not to be as effective initially as earlier Chobham . I believe there have been some casualties from rpg strikes which seems wierd. Possibly something to do with the air gaps narrowing around joints.
I woul like them to come up with a new version with a rubbery coating to prevent panzer rash
