the DA output converters are probably identical, as both Pulsar I and II are 24 bit, AD1855 by Analog Devices.
The input stages are different. Pulsar I uses the 20-bit AK5352 by AKM, so Pulsar II possibly has the 24 bit version 5353.
Anyway, converter specs alone are pretty useless.
Generally one assumes that if a quality converter is choosen, the ANALOG and CLOCK(!) circuit design is accordingly, which will (in any case) end in a fairly expensive design.
Imho it's somewhat suspective if high quality converters are touted in the ads of relatively cheap gear, like EMU does (for example).
It's legitimate though, as they state nothing but using the same parts.
Which makes the average reader think 'wow, must be the same sound'. Of course that's nonsense because they don't use the same circuit...
No intention to diss EMU (never heard that card myself), just used them as the next best example.
cheers, Tom