Nopes - the oils are exactly the same... How do I know, SOPUS (Shell Oil Products US) is in Houston and I have a bunch of freinds working there. Are you thinking that shell in Pakistan sells - Gawalmandi marka tael?.
Why dont you send a 200 ml sample of this to the address on the blackstone report, I will send a sample of penzzoil ultra 5w30, you will know your answer.
If you think Shell products are different - I can show you a shell product in the USA whose packaging is so bad - it has no foil seal, the bottles leak, the printing is terrible - yet its still a genuine shell product.
Stop being naive - LM and other small time oil khaip agencies maybe giving you good profit compared to Shell, Chevron and Mobil - thats no reason to praise a product. Specially if its known to be inferior.