The toggle is the gain switch - people were wondering if the rear may be better for that. Undecided here
One of the LED displays on the input button/knob if for the 3-D awesomifier
Thinking the LED over the headphone jack confirms if phones are plugged-in or not
Chord does the same with informative LEDs indicating incoming format/resolution but uses one window and different colored LEDs.
This Jules Verne porthole window becomes part of the Chord branding but perhaps a more elegant way of doing the same thing as the 8 faceplate LEDs on the pulse.
The Chord headphone amp costs $1500. The Pulse DAC/Amp is targeted at $600. I personally prefer my money to go into sound quality over bling.