Any Idea why P800 prints look bit grainy than 1500W

[Ravisteam]

I have a 1500W and P800 .When printing metals its seems 1500W is sharper than P800 as the P800 seems a little grainy too..Whats your opinion and experience guys ?.

[UK Printed Mugs]

We use P800 for fine printing especially for keyrings. Have you got print quality set as "Max Quality"?

[Ravisteam]

We use P800 for fine printing especially for keyrings. Have you got print quality set as "Max Quality"?

My colours work best only on inkject ptoto paper and in only has quaity only , not Max quality ..Any other papaer setting is not working with my icc profile .(I dont this my icc is 100% as well tho ) .Do you think this could be the issue ?.