Less noisy exhaust

Schaltroller / Classic Motoscooters Vespa Wideframe
1

Hello,

which one is less noisy :

exhaust : 24108100 : http://www.sip-scootershop.com/en/products/exhaust+standard+w+silencer+_24108100

or

exhaust : AB-PX : http://www.sip-scootershop.com/fr/products/echappement+racing+replique_ab-px

i ride a GT 1964 with pinasco 177 alu ( my motor is really noisy with original exhaust system )

thanks for your advices.