First, the RR Sport and RR should not be compared. They are very different vehicles. The sport does not indicate a chassis tuning, etc., it is a completely different vehicle. So when people say that the sport cannot be much better than the stock RR, yes, it is.
Second, the RR Sport is a lot cheaper than the RR. By about $20k or so. You would not cross shop the two.
Third, the RR Sport is cheaper for a reason. The interior is pretty low rent for a vehicle that starts in the $50's and can be optioned (Supercharged) into the low $80's.
Fourth, Reliability has been improving under the Tata ownership. Not getting worse.
In the end, I'd pass. Unless you like getting about 10 MPG and living with a low rent interior.
Sophisto Grau / Oyster - Black Nappa, Anthracite Wood Gone but not forgotten.
Heaven is where the police are British, the cooks are French, the cars are German, the lovers are Italian and it is all organised by the Swiss.
Hell is where the police are German, the cooks are English, the cars are French, the lovers are Swiss, and it is all organised by the Italians