I'm not sure during driving, but if during idling, DEFINITELY Myvi is worst; If you said yours is worst, then I think you need to send your lion for medical checkup
Myvi has very bad idling noise "Brrrr.... BRRRRRR... Brrrrr... BRRRRR..." non-stop, it's so darn annoying, and it's LOUD. Even Vios have this too, but at least Vios ain't so bad inside the cabin. It's so loud even outside, sometimes I'm washing my car and someone visit the neighbour, be it a Myvi or Vios or some other car, it's just so annoying the sound keeps "Brrrr... BRRRR.... Brrrr... BRRRRR...".
If during driving, possibly because the RPM, when you notice it's loud, check if the RPM already hit over 3 ~ 3.5K which is normal for any engine to have louder noise; Besides, the stock Bestari does not come with hood insulator. Try installing a good hood insulator. The CBU 206 by default comes with one and the material is not those rubbery type sold in NZ Galaxy. Check the 308 THP version then you'll know.
Finally, for the engine noise; I can't remember exactly Bestari's engine noise, but Wira's engine noise I'm very familiar, when you hit very high rpm, the noise is SHARP, but for my 206 and the Prince engine (308 VTi, 207 VTi) the engine sound is more bassy/boomy, MANLY! I like!
Perhaps you can try differentiate with your brother's Myvi at high RPM (if he allows it

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hi andy !
idling no noise . 206 is quiet

it only happens when u start moving the car / accelerating from stationary point..the engine goes whee whee... haha like the engine push so hard

oh and i feel it noisy only in the 1 st gear... once shift to 2nd gear its ok..
n if im not mistaken if over 3 k engine loud is normal, but this is before 3k.. its like the engine struggling.
ive got the nz hood insulator already . maybe i should soundproof my car .?
or perhaps get a K & N open pod hahahaha

ure using one right andy
p/s
i have no bro, myvi my gf one

will try again. no confidence to push the myvi . scary
http://www.facebook.com/thepadangsMy sweet peugeot 206 1.6 16v

Mod list : k & n typhoon air filter , 4-2-1 mandrel bent custom extractor , full piping s-flow brand topcat 1.6", denso iridium spark plugs, Unichip Q tuned by RS Impressive, 16" OZ rims
Max BHP & torque : 127 bhp @ 6,00rpm , 173 nm @ 4,000rpm (tuned for torque)