This is true, but only partially. We've recently reviewed HD 630 VB. These headphones are comfortable, despite the fact that they are quite heavy. Yes, they are better for home use. Their mobility comes from the fact that they don't need a power amp and sound well connected to the smartphone or tablet. In our opinion, they can be portable, but they are more suitable for home listening.
Beyerdynamic T5p are typically mobile, so it's hard to compare them with HD 630 VB. These Sennheisers are much more similar to Oppo PM-3. Their performance is comparable, especially because of the neutral tonal balance. PM-3 are slightly smaller, lighter - more 'portable', but HD 630 VB are easier to drive by mobile devices.