While I'm not "sure about that", unfortunately I've had a lot more personal experience with ADCs than that. While their experience and abilities run the gamut, they are not as experienced as the actual SJAs (theoretically, at least -- I'm sure there are outliers in both parts of the job). Think about it -- most ADCs are Captains and SJAs are Majs, Lt Cols, and up. Again, the real issue with ADCs is that they are public defenders who are many times dealing with a good number of cases simultaneously and can't dedicate all of their efforts to your case.
But, the constant is that neither of them (ADCs or SJAs) can hold a match to a good civilian attorney who was formerly an SJA.
Regarding Bud Day, the only experience I've had was as a recorder at an FEB for an IFF washout. His style was very aggressive and he did, indeed, completely tear apart the case and get his client reinstated in the IFF program. His understanding of how the AF training system worked -- especially with regard to how the course training standards for grading worked and his knowledge that IPs can sometimes write comments about graded maneuvers that do not directly support what the CTS says for a particular grade -- was key to his courtroom victory when I observed him. It was quite impressive. His overall style was very aggressive.
That being said, my understanding from speaking to other attorneys who have worked with him (or even against him) is that his style is becoming decreasingly effective in the current AF climate. Reportedly, his opening statement usually revolved around him tossing his Medal of Honor coin on the ground in front of the board or jury, and saying "there are two sides to every coin....." It was apparently heavily reliant on the respect value he personally had as a MoH recipient rather than a cunning strategy as an attorney (combined, of course, with a very type-A aggressive style overall).
Based on a good number of people I've seen in the AF these days who would potentially be board or jury members, not only would many not have any idea who Bud Day was or what he'd done, but many would also not be impressed even by those things he's done. In other words, that respect value is decreasing, EVEN amongst flight-suit wearers (such as might populate an FEB). A non-tactical background pilot I flew with last summer went on a tirade about what a rogue Joe Jackson was for landing his C-123 at a closed airstrip against orders and that he should never have been awarded a MoH for such a blatant violation of flight discipline...so you never know what some folks might find of value.