What’s the difference between the Holmco PD-81 & Sennheiser HDA300 headphones?

As the Holmco PD-81 is more soundproof than the Sennheiser HDA300, it is recommended if you don’t have a booth and the environment is noisy.

The Sennheiser HDA300 is smaller and lighter and ideal for booth use.

Both come with their own carry bag.