ADA I	ADA II
Analogue I/O	ADA I is not compatible with the newest high end iZ converters.	ADA II is fully compatible with Classic 96 and Ultra Nyquist analogue I/O boards.
Display	ADA I has a 7" screen.	ADA II has a larger 10.1", higher-resolution display. The user interface is easier to use, with more buttons on fewer screens. The Main Screen shows both the A/D and the D/A meters.
New Front Panel	ADA I has a glossy panel that is easier to scuff or scratch.	ADA II has a new fingerprint-resistant front panel with a high-contrast white LED ring-lit power switch.
AES Multichannel Card Support	Not available with ADA I.	ADA II supports the 24-channel transformer balanced AES card.
Protools Sample Rate Error Indicator	Not available with ADA I.	ADA II has a new ProTools sample rate error indicator.
Software Updates	ADA I software will not be upgraded past 1.0.1.	ADA II is compatible with all new ADA software upgrades.