A new analyst report suggests that the Apple Watch may be released in both 4 GB and 8 GB versions. Based on discussions with Apple’s suppliers, Timothy Arcuri of investment research firm Cowen and Company released a note to investors today outlining that the component makers expect the Watch to include 512 MB of RAM and and 4 GB of storage in the “mainstream” version, with a larger-capacity 8 GB version also expected to be available.…