There is actually a significant difference between the two models: Sysnchronous and asynchronous ram. The regular Chronos uses asynchronous nand and the deluxe uses synchronous which is much more desirable. Synchronous nand likely will wear better and have a longer life, it also works better with incompressible data, like pictures and videos.
I highly recommend the Chronos Deluxe, Mushkin is an American company based in Colorado. They have great products.
For some reason Newegg is advertising the Chronos as "Chronos Enhanced" but the part number is definitely for the Chronos. I did some checking. At the beginning of last year Mushkin did advertise it's Chronos Deluxe as the "Mushkin Enhanced Chronos Deluxe". Looks like things got mixed up at Newegg.
Also to clarify any confusion, Mushkin's products are often labeled as "Mushkin enhanced" so it isn't an enhanced version per se. If you look at newegg under their system memory it is labeled as Mushkin enhanced. So its a brand name.