Advertized performance and reviews for SATA III drives are based on (1) Drives is connected to an intel Sata III port and use iaSTor as the driver (msahci is close but slightly lower performance. (2) Normally based on benchmark using data that is readily compressable.
Hate to be the bearer of bad news, But SATA III SSDs on gsata and marel based controler (Especially the older marvel controller) come out on the short end of the stick.
One bright spot - Don't sweat High Sequencial read/write performance to much as it does not translate tha well to improved performance for an OS + Program SSD - It's the Random 4 k read/writes that are important.
Bottom line, You can RAM it, but that's not going to change the performance, nore will switching brands make much difference.
Ignore the Benchmark (Hmm amoust like a BM movement) and go by your real life performance. When you upgrade the system you can brag about the BMs then.