Super Puma AS332L/L1s have a shorter cabin than the L2s and EC225s. Furthermore they never carry more than 18 pax and for this reason the centre rear seat is never occupied.
The EC225 seating configuration is staggered in the Bristow version to obviate the discomfort of shoulders pressed against each other. The worst position in the cabin for interlocking knees is at the rear, so if fewer than 19 pax are being carried, I try to ensure that one of the rear seats remains unoccupied.
It also helps in the EC225 that the considerably larger windows allow more scope for passenger upper arms and shoulders be accommodated in the window recesses.
Overall in the EC225 there is a little more legroom in the longer cabin and a bit more shoulder room than found in the AS332L/L1.