Does premix oils matters?

Hello, I just recently bought a fully Stage6 2007 yamaha aerox, from a guy, he game me this oil ((( https://www.amazon.co.uk/Rock-Semi-...ocphy=9045438&hvtargid=pla-700350010778&psc=1 )))
and said that it's the only l oil I can use, but I was at a motorbike shop and they said it doesn't matter that much as long as its 2 stroke pink, and I bought a this one ((( https://www.halfords.com/motoring/m...QwT9Ll4TCLvT_ZhtGUhWQVzDuN5QnaSIaAr4fEALw_wcB )))
I am not sure who to belive.. Any suggestions on what should I do?
Thanks.

 

As long as it's not cheap own brand mineral, any good synth or semi synth will be the ticket.
Remember to let the bike warm up before riding it hard, and use good oil, then you should have a pretty trouble free bike.