4 B&W Signature 7NT in wall Speakers vs Polk Audio RC80i 2-Way In-Ceiling Speakers? HELP!!

I'm planning on installing ceiling speakers mainly for a home cinema set up as well as music and was thinking of getting some Polk Audio RC60i 2-Way In-Ceiling Speakers on amazon for £228 a pair. But i spoke with a friend and he offered to sell me 4 B&W Signature 7NT in wall speakers for £200.

So my Question is, Which are the better speakers out of the two
and what would you say is the better option considering the quality and price etc..
i'm stuck as i don't have a clue when it comes to speakers!

heres the spec list of the two:

B&W Signature 7NT in wall Speakers

180mm KevlarÆ bass-midrange driver
25mm Nautilus tube loaded metal dome HF
150W power handling, 8 ohms Impedance
88dB Sensitivity; 40-25kHz ±3dB
Switchable HF response: -3dB-0dB+3dB
337h x 220w (without frame), min depth: 97.5mm


Polk Audio RC80i 2-Way In-Ceiling Speakers
Compatible Amplifier (Watts RMS): 20 - 100
Frequency range (Hz): 35 - 20000
Impedance (Ohms): 8 - 8
Sensitivity (dB): 90

Thank you