Is this Correct? 2 SSD Raid 0 Outperforms 4 SSD Raid 0?

OCZ Vertex 30GB Raid 0.

I will be running Win XP-64 Formatted NTSF 4K stripped file size. Based on reviews, utilizing 4k stripe size, two (2) Vertex 30gb Raid 0 has better read / write performance than four (4) Vertex 30gb Raid 0 (same capacity) ssd's, respectively.

2 Vertex 30gb ssd Raid 0 4k stripe size read = 336 MB/s; write = 317 MB/s.
compared to
4 Vertex 30gb ssd Raid 0 4k stripe size read = 145 MB/s; write = 140 MB/s.

I recognize that if I chose 256k NTFS stripe size, and not 4k NTFS stripe size, then in that event, four (4) of the above ssd's would clearly be the best performance choice, as they would outperform two (2) of the above ssd's, at 256k stripe size.

4 Vertex 30gb ssd Raid 0 256k stripe size = 738 MB/s read 620 MB/s write, compared to
2 vertex 30gb ssd Raid 0 256k stripe size = 424 MB/s read 324 MB/s write.

My question is, "am I reasoning correctly? Here are the two reviews I am referring to. Notice each testbed system in essentially the same, but for ram and OS. The 4-R0 ssd test bed is Win7 8gb ram; the 2-R0 ssd test bed is 4gb ram running xp pro, presumably 32-bit ver.

4 ssd striped raid review is found at:
http://www.ocztechnologyforum.com/ [...] hp?t=58002

2 ssd striped raid review is found at:
http://www.ocia.net/reviews/vertexraid/page5.shtml

Thank you all in advance for your time, consideration, input and collaboration.

Jeff

Michigan