Travel / Comparing London and Warsaw? Does anyone know both cities who could help? [9]

Hi, I just came across this forum while researching a trip to Warsaw for an article I'm writing.

I am trying to compare areas of Warsaw to London and wonder if anyone can help. I am comparing the "feel" of the areas rather than the aesthetics. For instance the Soho comparison would be the most touristy area with lots of clubs and restaurants etc - Śródmieście perhaps. And Shoreditch would be somewhere that used to be gritty but now trendy with good nightlife - Praga perhaps (found online)?

I know there are not going to be direct comparisons and it might sometimes be only a few streets that are relevant but if anyone can help this is the list I am trying to compare for the areas I'd like to visit in Warsaw

Mayfair (posh, expensive)
Notting Hill (cafe culture, quaint, arty)
Shoreditch (trendy, nightlife)
Soho / West End (touristy, restaurants, clubs, gay area)
Camden (grungy, life music, markes)
Hackney (gritty, alternative, arty)
Hampstead (beautiful, sleepy, historic)
Islington (cafe culture, bars, buzzy)
Chelsea (posh, cultural, high end restaurants)

Many thanks in advance,

Cat