The hummingbird (Galaxy S) @1GHz is supposedly slightly faster than an ARM Cortex A8 @1GHz.

The Texas Instrument (Droid X) chips are supposed to be equal.

The original (Nexus One) and second-model (HTC EVO 4G) Snapdragons @1GHz are noticably slower than a standard Cortex A8 @1GHz.

The second generation Snapdragon (HTC Desire HD) @1GHz is supposed to faster than the previous model, but I sense it is only on par with the Texas Instrument @1GHz.

Ofcourse, anything with Cortex A9 demolishes these ... but the "slight" power difference between the GalaxyS to the Nexus One is not apparent if the drivers/coding is sloppy *ahem Samsung *ahem.

I don't think the differencies are too big between the 1ghz 45nm club that includes the OMAP36xx, hummingbird, new 45nm 1ghz Qualcomm(found example from Desire HD) and Apples A4.
Hummingbird uses the most powerfull GPU so it probably comes out as top, but i think you are going to find out if the software is optimized before the slight differences on those above.

Cortex A9 is actually something you might see the difference, if not because of increased speed you should find fully functional HDMI out that TI, Samsung, Nvidia, ST-Ericsson etc all include. Also the mpx count increases from max 12mpx that it is now, possible 1080 via HDMI out and increased resolution for video recording.

Looks like the Qualcomm GPU is older gen than the Cortex one too: http://forum.beyond3d.com/showthread.php?t=56866&page=2

I believe you are talking about the old snapdragon here? There's two 1ghz snapdragons. The older one is 65nm bases and the newer one(again, found example from Desire HD) is 45nm based and got new GPU(Adreno 205).

http://androidevolutions.com/2010/10...sung-galaxy-s/

Ah ok, thanks for the correction