Zerk2012 :
Their differences in drive bays such as 5.25 inch and 3.5 and 2.5 also internal and external. The 5.25 will be external meaning you can access them from the outside of the case the rest will be internal meaning no access unless you have the side of the case off, the only exception would be a hot swap bay where it would accept a 3.5 2.5 drive from outside the case.
You can also buy a USB optical drive that plugs into the case or motherboard through the USB port.
If you list the case your looking at I could tell you absolute.
IN WIN GR one Black Black SECC Full Tower Computer Case ATX 12V/EPS Power Supply Compatible
and
RAIDMAX Viper GX ATX-512WBR Black/Red Steel / Plastic ATX Mid Tower Computer Case
also
Rosewill REDBONE - Black SECC Steel ATX Mid Tower Computer Case
as well
AZZA Solano 1000R Black / Red Japanese SECC Steel/Metal mesh in front MicroATX/ATX/Full ATX Computer Case
sorry for the trouble i just don't want to miss the opportunity