M-audio Profire 610 or Focusrite Saffire Pro 14

[marcoeatsbrains]

Hey guys i can´t decide between the profire 610 and the focusrite saffire pro 14 i'm not gonna use the mic preamps only direct using the Hi-Z instrument imput i'm looking for the best A/D-D/A conversion quality but booth are very good interfaces i guess... i don't care about the number of the inputs or outputs.
Which One of these has the best A/D-D/A converters?
hope you guys help me a bit