Once again validating Dieter’s iPhone 3GS vs. Palm Pre web rendering smackdown, MacRumors reports on Medialets‘ latest Sunspider Javascript tests pitting the iPhone 3GS against the iPhone 3G (both on 3.0 and 2.2.1), Palm Pre, and Google Android G1.

As MacRumors points out, not only is iPhone 3GS’ clear, current speed advantage impressive, but the 3x improvement iPhone 3.0 gives the iPhone 3G is most impressive as well.

Bill Gates’ “power of software” indeed…

TapTapTap, developers of the upcoming Plasma app decided to slap a big, honkin’ frame rate indicator on a raw version just to see what differences, if any, the iPhone 3GS hardware provided compared to the previous generation iPhone 3G. The results?

As the video shows, in our OpenGL ES testing, the 3GS is generally close to four times faster than the 3G. Results will vary depending on the application but this is remarkable to say the least.

Check out the link above to watch the full QuickTime video. Impressive stuff.

TUAW, meanwhile, had this to say:

On a related note, we hear that Apple has done “even more” than we can publicly disclose around speed improvements on the device.

Hmmm, do tell?

Two iPhones, 6 apps. We know the iPhone 3G S is supposed to be “on average” 2x faster than the iPhone 3G, but stats are stats and what we’re interested in is real-world usage. A few seconds here, a dozen or more there, and all of a sudden they add up to minutes.

In this video we launch apps on each iPhone 3.0 device at the same time, but imagine if every time the iPhone 3G S finished first, we immediately launched the next app. We wouldn’t make you sit through that much iPhone 3G lag, but that makes the point.

Also, we put a few webpages into Safari, then launched a heavy app, waited for it to load, then exited and went back to Safari to see how many would still be in memory.

Let’s just say, double the RAM makes more than double the difference…

Two iPhones enter, only one can be left standing. Which one will it be? Well, both devices got the Nitro JavaScript rendering engine boost courtesy of iPhone 3.0, but the iPhone 3G S brought a little gun to this knife-fight in the form of double the RAM, a faster GPU, and a super souped up processor with higher clock speed and phat’er pipes. (Think 486 vs. Pentium on the desktop).

So let’s just load up our friends CrackBerry.com, PreCentral.net, theiPhoneblog.com HQ, and Steve Job’s perennial New York Times test page and see.

(No, not which will win — we already know the answer to that! — but by how much?!)