The difference is. Raxco are trying to sell you a product, we are not.
Defragging an SSD won't gain you any performance as the reading or writing is not done with a mechanical head like it is in an HDD, moving read/write heads takes time, so the less distance the head needs to move to read or write the next block of data, the faster the HDD is, that is why defragging an HDD speeds things up. On an SSD however, read and write access times across the whole SSD are identical, so moving data around will give you no advantage whatsoever, and because you are moving data around that doesn't need moved, you are using up write cycles.
MTBF means nothing, as that is the expected life cycle of the electronics in the SSD, not the NAND.
Older SLC NAND has 100,000 write cycles. Modern 34nm MLC NAND has 5,000 write cycles, the next generation of MLC NAND (25nm) will have 3,000 write cycles.
Free space consolidation is different from defrag, it only consolidates free space rather than move data around on an SSD. I've tried it, and could never detect any increase in speed, and because even consolidating free space uses at least some write cycles, you are wearing the NAND, even by just a small margin.
Also, you should not be put off an new SSD just because sequential read/write speed will be unlikely to reach 285MB/s, as sequential performance doesn't make a great deal of difference when the drive is used solely as an OS drive. Vertex 2 has massive small file random performance, probably 50 times faster than that MTron drive, but still under 100MB/s, so you could probably make use of that speed, even in an Atom system.