Original Volvo OEM WAS the best, but that was back when the manufacturer gave a shit about spare parts longevity for the old models, long lasting parts are too expensive to make and it's no longer in Volvos best interest to waste money on classic parts design. It has something to do with parts no longer being made in Sweden and reducing manufacturing costs
So, don't buy new genuine strut mounts unless you want to replace them every six months, the rubber begins separating from the metal even before that
Some things must be genuine fitment, other things there has been better types made (www.bneshop.com) so in all cases genuine only or better if available