Thankyou so much!! I really appreciate the help

I was reading your article here. 

I was wondering in regards to upgrading your ram for the imac within Australia. 

Pardon my total technical ignorance. Is there any difference between these

Crucial 64GB Kit (2 x 32GB) DDR4-2666 SODIMM Memory for Mac. CT2K32G4S266M

Crucial Ram Kits if I was too look up the same details from an Australian supplier and purchase them to install or do you recommend an Australian supplier?