thank you for the information.Looks like nobody answered your initial question.
Mivec RS vs Mivec normal, Mivec RS have titanium intake valves, different cams with more aggressive lower cam which is why the mivec switchover is at a higher RPM. Water/oil cooler at the rear of the block, oil squirter jets on the block for piston cooling. Mivec RS engine also sometimes comes with an LSD gearbox as well. Gear ratios are also slightly closer if not mistaken but I had forgotten the details.
I also notice that when I cold start the car, a moment later, the exhaust sound like I'm running on high cams. its very noticeable. and when I switched ON the AC, the 'high cam sound' gone. after the temperature reach to it's operating temperature, the 'high cam' sound is still there when the AC is off but it's not that noticeable..
is this the characteristic of mivec RS? since most people said the mivec RS is running on more aggressive cams..