Most of the ocz performance increase was for heavy read/write random usage. but the basic read performance which is typical personal usage isn't exponentially different.
Perhaps if you were using it with intel srt, and you had to randomly read/write and access lots of data, you would gain to some degree.
In personal use, any ssd is the big jump up; so you are splitting hairs on performance after that.
m4 has been released longer, so potentially more "stable" and more reliable and owned by a lot of people.