Can anyone enlighten me if particulate filter and catalytic converter are the same thing on petrol engine?
No.
Catalytic converter is a "chemical device" where some type of exaust gas are modified, CO -> CO2, NOx -> becomes N2 and O2, HCx -> H20 and CO2, birefly this device tries to complete the combustion process giving no toxic or polluting matters. There is a sort of honeycomb, platinum, palladium and rhodium internally plated that promotes these reactions when the hot gas just touches the walls of the honeycomb.
The particulate filter is different, it's a filter stopping big pieces of particulate made by not fully burned gasoline or diesel. Then pieces are burned, reducing their size untile they can pass through the filter.
Sometimes we can find PF+Kat in the same assembly, placed close to exaust valves since the PF will work better if gases are hot, so it's not easy to understand if the car has PF or not just having a look under the bonnet. Anyway, EUDM GK5 Jazzs HAVE the PF.