Quantitatively worse than Bush, as far as government transparency goes. Bush was far more willing to tolerate leaks and whistelblowing, and almost certainly would not have condoned retroactively classifying these photographs. He had opportunities to do this kind of thing, and he did not take them.
Meanwhile the Obama administration has been repeatedly characterized as the most secretive in US history, and the most aggressive in prosecution of whistleblowers. The numbers support these claims, although of course we can't really know how much Obama's people have successfully hidden from us.
Consider that we know quite a bit about the horrors of the Bush administration. Uniformed US soldiers raping teenagers in front of their parents at Abu Ghraib, uniformed US soldiers torturing a known innocent man to death solely for the pleasure of hearing him scream for Allah's mercy at Bagram, the sadistic practices of the CIA's "extraordinary rendition" program and secret "black jail", etc. The Bush administration leaked like a sieve, as it should have.
But personally, I suspect the current administration is up to something even worse than anything Bush's sadists did, since Obama's being so much more aggressive about hiding it. Most people who voted for Obama are unwilling to face this possibility, though; it seems Americans are often incapable of accepting any fact that doesn't support their pre-existing ideology.