Hobbs / NW3 question. Generous sizes or not?

[MaryMotherOfCheeses]

The frock I want is in the sale. I can either get a 12 at Hobbs for £79 or a 10 in John Lewis for £99.

Are they like M&S sizes?

Pretty generous, I'm between a 12-14 and in Hobbs I come up as a 12.

Hmmn I find NW3 on the small side where main Hobbs is generous.
Get both? yes you'll waste postage on one of them but Hobbs does free returns (not sure about JL)

I definitely find NW3 smaller sizing that mainline hobbs!! I agree-buy both and then return the one that doesn't fit!