Well, I don't want to sound unduly judgmental, and I don't feel all that comfortable disagreeing with Adam, but I'm not particularly impressed.
Yes, this guy is a good harp player and he can sort of get up to SB's speed. But, unlike SB, he's sloppy, is playing patterns and for that reason does not have particularly good phrasing or control on the high end. Getting up to to SB's speed is one thing. Playing at that speed with precision, control and PHRASING is what sets SB apart.
Nice to hear a player playing in this style, though.
I first met Giles over 10yrs ago, when he was studying in mainland SE UK and sharing harp duties with Roberto Piazzarelli (one of the finest West Coast style chromatic players I have heard...after Rod P, of course) in Frank Nazareth's Sensational Midnight Willie band. Frank Jr (Frank's son, confusing I know but bear with me) was later snapped up to play drums in Paul Lamb's Kingsnakes, as was guitarist Raoul de Pedro de Marinero. The Midnight Willie band was a HOT outfit, let me tell you.
Giles is an excellent harp player, I don't think that the clip above really does him justice, apart from anything, after Sugar's intro, the media compresses when the band kicks in and the harp mushes out.
I'm not surprised that Giles' band the Dirty Aces got some of the work backing Mud Morganfield (he has also been backed by Big Joe Louis's Blues Kings, feat. West Weston, in the UK) as Muddy's style of Chicago blues seemed where Giles was most at home...OK, perhaps that was his basis, but he always puts his twist & embellishments on it. I suspect he plays the way he does in the above clip in deference to Sugar, as a tribute as much as anything. In my experience, though he may respect Sugar Blue, being a Sugar Blue clone is not his stock in trade.
Giles is also a good singer & charismatic front man, I always used to look forward to his rendition of Muddy's, "My baby ran away with the garbage man". I always found Giles to be very friendly & personable, complimentary if he felt it was deserved, often singing the praises of his peers (& the aforementioned Roberto) at jams - perhaps Trenton caught him on an "off" night?
I'm surprised he isn't better known, plenty of lesser talented players are.