In terms of features, there are no real extras, and this model doesn't have a built-in microphone for making cell phone calls. What you get is a sturdily built closed-back headphone set that looks more expensive than its price might indicate -- even if it isn't luxurious. For instance, the earcups are well-padded but aren't terribly plush or made of leather or anything fancy like that. Also, they don't come with a carrying case and they don't fold flat. And like most other closed-back over-the-ear headphones, they will get your ears pretty steamy if you wear them outside on a hot day.
The RP-HTX7s are notable for their clarity and generally well-balanced sound. If you're into big bass, these probably aren't the headphones for you, but they do deliver an ample amount of low-end and it's pretty tight, especially considering the price of these headphones. While the headphones are fairly even-keeled, there's a little bit of treble accentuation (they're a tad bright), which can lead to a slightly harsh edge when you dealing with tracks that aren't particularly well recorded. Or, to put it another way, the headphones will make bad-sounding tracks sound worse. By the same token, well-recorded, lossless tracks will bring out the best in these headphones.
We review a lot of headphones here at CNET and are always on the lookout for models that deliver a lot of bang for the buck. The RP-HTX7s fall into that category -- especially if you can get them for $30, their current low price online (note: you have to add them to your cart at Amazon to get that price). Needless to say, you can't expect the world from $30 headphones, but if you're on a tight budget and still want something that sounds good, this set will certainly fit the bill.
Are they better than the slightly more expensive
Add it all up and you're looking at an excellent pair of entry-level over-the-ear headphones. No, their design and sound won't appeal to everyone, but most buyers should come away feeling like they got a great bargain.