Gonna have to disagree with this assessment. I'm with the reviewers on this one. Heres why:
Graphics: Mostly a toss up. RE has better character models and lighting, DSE has better textures and doesn't look like it has vasaline applied to everything, also the faces and expressions are better.
Music/Sound: DSE has better voice acting. RE has better music. Another toss up.
Story: DS:E takes this one because it didn't rape perfectly good source material like RE. WTF were they thinking especially with the CV stuff. Also the South American story is beyond weak.
Controls: A toss up... again
Gameplay: DS:E by a long shot. Headshots are cool but standard issue. The limb removal is a blast and makes the game far more strategic and unique. Also while the shaky camera didn't bother you much it seems to bother most people quite a bit. I got mostly used to it but it is still stupid and doesn't increase tension- just frustration. Luckily it lays off somewhat after the early levels
Bosses: RE wins this, but only because DSE pretty much lacks them. The RE ones are pretty broken though, allowing you to "kill" a boss and having to wait until it actually dies thanks to the pre-scripting. That is just lazy coding. Still RE winds by default
Length: Toss up. Both too me almost the extact same amount of time to beat. Both have good replay value. Sadly each contains its fair share of filler.
Difficulty: RE is a little harder I agree. But this is often due to frustrations with the camera or bosses you've killed who won't die as you are running out of health. Both games have an acceptable difficulty level. RE takes this one because it actually gets brutally hard on the highest difficulty while DSE is only fairly hard.
Scoring/Ranking: RE has a better ranking system. But DS:E doesn't rely on the gimmick of shooting everything in sight. Both lose points for not having good combo systems.
Unlockables: RE wins this one too. Though neither has impressive unlockables.
Replay value: Toss up. Though I agree skipping cutscenes is nice in RE. However the strategic dismemberment keeps me coming back for more while headshots just seem bland in comparison.
Other stuff: Both games have a poor balance of weapons, strongly favoring the default weapon. I disagree that DS:E is worse though. I ended RE with an arsenal that I never bothered to use.
Summary: Lots of toss ups. But DS:E winds where it matters gameplay and story. RE pulls ahead in some areas thanks to bosses, a good ranking system and unlockables. In the end though I just enjoyed DS:E a bit more. It seemed original, and unique while RE came off as an improved UC but a worse Overkill. Both loose major points on weak combo systems, something that is essential to any good shooter.