Well allow me to retort.
From the OP's post I take it he is implying that there is a tacit act of racial profiling going on. A made up name is used and then he uses his real name "Hussain" and the quote is far higher. Why's that then, must be racist?

Really? No.
Racial profiling is not used in generating car insurance quotes. Far from it. Actuaries base their quotes on statistical analysis of decades worth of claims,crimes and perceived risk.
N.B. The OP makes no direct claim of racism, I took it as implied by the

, but happy to retract the above if not. But my premiss remains the same.
So, why the difference?
Probably a combination of technical FUBAR on their end, and him maybe not deleting browser cookies when changing the name. They store all the information you give them. Regardless of how may times you change/re submit your details.
It’s against the law for a trader to discriminate against you because of race when you buy goods or services.
Race means being part of a group of people who are identified by their:
Race
Colour
Nationality
Citizenship
Ethnic or national origins.
This is covered by the Equality Act (2010)
http://www.legislation.gov.uk/ukpga/2010/15/contentsSo we can assume with a fair degree of certainty that Go Compare and the insurance company providing the quote(s) didn't give you a higher one because your surname wasn't Smith.
Now. There are many factors in car insurance that are contrary to "obviousness"
E.g.
More expensive quote for a car garaged overnight versus a car kept on a driveway.
Why?
Well, if the claim/crime statistics show that more cars are stolen form garages in your area than driveways, it follows that those quotes are higher, because the perceived risk is higher.
But, a persons name has no bearing on how much an insurance quote is.
I thought it reasonable that all the above was known to the man on the clapham omnibus. But alas, no.
Hence my reply.
For my second reply to "XMC1980" That's just for the idiotic reply, and the fact he thinks that they're "Negligent"
But hey. Don't listen to me. Why don't you write to Gocompare and ask them, "why?"
I'm always happy to help everyone, regardless.
Jonathan.