I have tried both of these, and have come to the conclusion that the DC33 is superior. Here's why:

-The suction and brush bar are clearly more powerful. This is what sold me. I can see the difference in carpet lines (medium pile carpet) when I use one or the other.
-35ft cord is a significant benefit over the 25ft cord. I can almost do the entire floor by just plugging in a single outlet. Two would cover the whole house. With the DC25, I had to constantly unplug and replug.
-Larger dustbin means I can keep vacuuming for longer without emptying. Also, the design on this one seems to keep the shroud (the perforated shield inside the canister) freer of stuck-on dust.
-Quieter
-Although a bit larger, it is a similar weight to the DC25.
-Critical sections can be easily taken apart to clear blockages.
-The DC25 has a tiny plastic piece that keeps the vacuum from tipping over in upright mode due to the ball mechanism. If I tilt the vacuum to... Read more

I did a lot of research before I bought this Dyson and almost got the DC28 Animal one because I have a large dog that sheds. After doing some reading online, I found out this is the exact same machine as the animal except for the attachments! That's the only difference! So I decided for $200 less than the Animal one I could do without the "special" attachments. The very first time I pulled this out of the box and used it in my living room I wasn't all that impressed, especially with the suction but I decided to go over my floor again and practice with the attachments. Well, it must have just needed to warm up or something being brand new because the second time the suction was amazing!! (and ever since!) It left the lines on the carpet from where I had vacuumed (I love that!) and it also fluffed up the carpet and made it feel like when we first bought the carpet and our feet sank down in it a bit!! Very cool!! And the best part - it picked up the dog hair!!!!! With my old... Read more

I have read many many reviews on the Dyson DC33 before purchasing. While the majority of them are positive, and I agree, there are a few negative reviews that are just ridiculous.

First, I agree that the extension arm does appear cheap and is awkward to use. Does it work, yes. Does this bother me? Not enough to give the vacuum a terrible review. This is the only reason I give it 4 stars. The handle to the wand is a bit flimsy. I get around this by actually holding the wand itself and not the handle.

Other than the above, the suction is fantastic. We purchased this vacuum for our new home. The previous owners had pets and vacuumed and shampooed the carpets before we moved it. The DC33 still pulls up dog and cat hair that the previous owners could not get out of the carpet. I have used this vacuum to clean my car and vacuum up dust from sanding our walls. I havent found any other flaws in it, other then the extension wand.

As for the other negative... Read more