Sennheiser HD558 vs HD 4.20s

[YeadOpa]

so somehow i am getting these two headphones at the same price (around 60 EUR) i haven't tried any of these but i am a rock/electronic guy so i like my bass not exactly basshead territory though.i have a nice set of speakers at home so i am looking for headphones to use on the go and the audio source is going to be my smartphone.
which pair would you guys recommend i get? 

 

[serman005]

  so somehow i am getting these two headphones at the same price (around 60 EUR) i haven't tried any of these but i am a rock/electronic guy so i like my bass not exactly basshead territory though.i have a nice set of speakers at home so i am looking for headphones to use on the go and the audio source is going to be my smartphone.
which pair would you guys recommend i get? 

the 558 is open, so maybe not so good for on-the-go, as it will leak sound both in and out of the headphone. I haven't heard the 4.20S but it looks like it would be built for being on-the-go. If you want recommendations for other headphones, let us know and we will provide them.