I'm new to Synology, considering purchasing a DS410, and read the WD30EZRSDTL storagereview review and reference to the DS411. Do they share the same chipset and system software? Although I won't need to upgrade drives for at least a year, I'd like to know there was a future upgrade path. I understand that the ultimate confirmation is the HCL. Also, besides CPU speed and memory, resulting in faster read/write performance, are there any other differences between the two NASes? Thx.