No they are not all the same.
Qualities of a good case should include:
1 Boards fit correctly (mb and cards)
2 Should be sturdy (flexing is bad but livable to a certain degree if never moved)
3 Good cooling
4 No blood should be involved.
5 Ease of use. I like drive rails. I like removable mb trays (although I have forsaken them for a sturdier case as of late)
6 price
7 Good ps although that is actually a seperate issue. If buyibg a case and ps it should move up to 2 or 3.
I really like the sx1030-1040 line lately. Built 4 in the last few months. Before that I used the Inwin Q500n. Not as strong or as good of cooling but good expansion. The inwin is a ford pickup the antec a humvee. Just my opinion but I've built a few. Cheap cases cost me a motherboard when cards kept popping out. HTH