Verified answer

They are both very good brands, I wish I had the choice you do right now.

it really depends on what you value in a case, I like quiet but I have had my eye on the C70, it looks great.

Though depending on what your criteria for a good case is, I would also look at reviews, Newegg not only has some of the best prices online but also some of the most reviews per product as well so I would check them out and others as well.

I like a windows so it would appear that the C70 wins but you might have a version of the GX700 that has a windows in mind.

Both companies make good products. choose the one which best fits your needs. As for price difference, consider whether or not you will need to add additional fans in order to remove all the heat or whether what is supplied is adequate? If more are needed, figure that cost into the cost of the case.

Ask yourself how much you will actually be looking at the case and whether or not it needs to be a work of art? Mine is on the floor under my desk, so looks are not much of a concern for me - so I actually save money purchasing B stock since I don't care that much about a nick or scratch or two ... Personally, future adaptability is far more important to me than any other considerations.

Both are good in making products i must say :)

I often end up writing the same question on other sites