One big difference (from my experience) is that consumer SSDs would go into the market first while enterprise products would continue to test for 6-12 months for more maturity. The consumer SSDs would go through frequent updates of firmware and flash revisions while the enterprise products would be frozen for much longer. With an agreement, you can guarantee the exact same product is available many years later. When I used to do SSD firmware development, I would back-port particular fixes to an older version of firmware so a customer could minimize risks of changes. For consumer side, we would just say try out the latest version.

I think the market is going through a shift as more redundancy is used at the server level and the SSDs are considered more as a commodity.