"The Samsung drive has much better random and sequential performance, maxing out the 3Gbps interface when it comes to sequential reads.
In regular use I doubt you'd notice a huge performance difference between the two, but if you want the fastest drive you want the Samsung. Compared to last year's MacBook Air (Toshiba) you get a huge boost in sequential read/write performance" http://www.anandtech.com/show/4528/the-2011-macbook-air-11-13inch-review/8
Also a treas with a person with both the sad say he can't se any difference.
Don't know if a difference could be detected after for example 1 year?