Is it just a difference in trim levels to the POP and Lounge and I'm taking it a panoramic sunroof isn't part of the spec?
Basic differences are the following...
Lounge has glass roof, chequered or POP seats, Split rear seats, Chrome trim & tail piece, option of white ambiance
Sport has rear spolier, sports seats (half leatherette), chrome tail piece
BOTH include B&Me & Air-con & Alloys which is not in the POP unless specified as an option.
Seen a 58 black 1.2 Sport which is lovely - red leather interior too, so looks fab!
I've had that particular spec in Black with red leather but with the manual and a 1.4 engine.
TBH I couldn't live with the sag in the driver's seat and it was a factor in 'moving it on'.
With the 1.2 engine IMHO the 15 inch sport alloys are a better bet but as mentioned previously the 16s multispokes or 5o-spokes look better. There's an example at the next price point.

In the past some were specifying the Chrome trim with the Black on the Sport trim - you can get away with it on this colour in the Sport spec.
Personally I prefer the body coloured mirrors - chrome backs on the mirrors IMHO on the black is too much.
From a personal opinion if I was going for a 1.2 Black Sport it would be in a manual. If I was going for a dualogic I would keep it girly in a Lounge spec in the 'hard to beat' BNW preferably with white ambiance. Pearlescent white (Funk White) looks great but it is an expensive colour to maintain.