Are you talking about Z1R ? and T5p 2nd gen?
Had a pair of these myself and yes the sound is quite good out of them and they are definitely a good bang for your buck. However comparing these to the Beyerdynamics is not accurate. They are very different headphones and the BDs are huge step up but you need something to drive them. Headphones are only as good as the kit that drives them
For anyone who wants a good pair around the £100 mark, try AudioTechnica ATH M50X. Not the same league as these or the same purpose, but they're a good choice for someone who wants a reference set without selling their soul.
I just got Sony's MDR Z1R which are in their burn in period. I would still say Beyerdynamics T5p 2nd gen are very close to them.
For this price.. I'd like to be able to see sound lol