I feel this is interesting yes they both contain the same rubish no doubt. I really don't think it is as simple as saying they are exactly the same however.
For one thing christians, despite a small band of red state radicals in america (our problem), has become of religion of apathy. Islam is growing, why? the amount of people who subscribe to the idea of jihad against non believers is more than the population of the united states, why? I am not going to say one of two evils is better or worse but consider somethings from an exegesis point of view.
The difference is not just quantitative, but quality. The political violence of the Koran is eternal and universal. Totally open ended. The political violence of the Bible was set particular historical (or faux historical in most of the bibles case) time and place. With the quran the violence remains a constant threat to all non-Islamic cultures, now and into the future.
The bible said things like commit genocide by killing this group or that group, ie midianites, yes awful and hateful. The quran's message of genocide is to infidels, that is very much more open ended, so when they quote their scripture about anyone who kills an innocent man has killed all mankind, what qualifies as innocent to them? If your not Muslim you aren't innocent.
Think about this too, the bible contradicts itself by having some of gods good guys lie to get out of trouble, still the general message in the bible is "lying is a sin". The quran through Kitman & Taqiya actually make lying a doctrine and good! These subtleties in teaching must have some affect on the adherent no? Am I wrong?
The nature of the desert god they all worship makes it all bad. But they are not literally the same book.