Agreed. The brand will not matter - what will is the file system. If you want to use the same partition on both Windows and Mac, you will need to format the drive in either ExFAT or FAT32, because OS X cannot write to Window's NTFS (at least not without enabling an experimental write feature that has so-so results) and Windows cannot read/write to OS X's HFS+.
FAT32 is an older format, with the downside being that it cannot handle files larger than (IIRC) 4GB.
ExFAT can handle larger files, but it does not appear to have anywhere near the robustness of HFS+ or NTFS (I find it is corrupted much more easily.)