Grenson have so many grades its hard to generalise on quality.
Try any made for Paul Stuart - Stuart's Choice Grensons and you won't be comparing to Loake!
I have some Chukkas that compare very favourably with Edward Green that I also...
I bought a pair of Cheaney Imperials recently and also surprised by the quality, particularly the leather _ they are not disgraced by comparison with Edward Green, John Lobb etc
And yes retail is £395 or $600
Actually i just called in today and had a couple of pairs given the basic shine. What a refreshingly sincere and knowledgeable man is Justin. Very generous with his hints for doing your own shoe polishing and passionate about good shoes....
Well I checked at TK Maxx Hammersmith (London) and indeed a few pairs of Cheaney Imperials
Ended up getting a pair Beaulieu in grey they look great and fit perfectly in uk 11F.
Alsosaw some really nice Santoni Fatte a Mano for even...