I am curious what the difference is between the two (other than one being EMC and the other Compellent). I have been told that the Unity has more enterprise class features, and SC is cheaper per terabyte. However, is there a list of features that I can gain access to that supports this statement?
There are many differences between, much more than just enterprise vs. "cheaper". Unity tends to be All flash, doing both block and NAS.. SC, tend to use a majority of spinning disks, has de-dupe, NAS is an add-on product, the FS8600. The SC does data tiering so older data ends up on slowest, least expensive disks over time. New writes by default go to the fast drives first.
My suggestion is get in contract with sales and they can cover this in much more detail, look at what you are trying to achieve and propose the best option for your specific needs.
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I've used both. And if I'm correct Unity is just the old VNX with a file head bolted on. SC is my preference, we have about 3PB stored on a dozen SC arrays. It used to be a stand alone company "Compellent" and could go toe to toe with (and actually beat) any VNX or even VMAX. Dell seems to be putting it as a mid range, but it's definitely enterprise class (at least the SC8000/SC9000). Even the smaller arrays are very good as they all run the same operating system and with the exception of the SCv3020 have all the same features. Just the higher number gets more CPU/RAM and more modular. You can get SC with all flash, but it does a very good job tiering if you need lots of capacity but know only a small percentage of you data is actually active (as is the case with 90% of systems, only about 10%, or less, of data is really active).