Mine is on the right, the Hop Thief is on the left. (Mine is only 5 days in the bottle so still not fully carbed).
I'll try and detail my findings, although I've never done a side by side before.
Colour - Mine is slightly lighter in colour, there really isn't much in it.
Aroma - Hop thief is more earthy and mine is more citrusy.
Mouthfeel - Mine is much lighter bodied.
Taste - Hop thief tastes more malt driven, while mine is more hop driven. Furthermore: hop thief tastes resiny and piney, while mine tastes citrusy and piney? I'm not sure how better to describe that. Mine also has a slight twang to it, which I'm guessing is the dextrose. (Really shouldnt have bothered with that).
Bitterness - About equal, mine tastes just slightly more bitter.
All up. I'm so much happier with this batch. If I was just brewing an APA I'd be stoked.
As for a Hop Thief clone. As an extract brew I'm not sure I can really play with the malt profile too much, I need to work on the hops. I think the citrus has come from pure late additions? So I might try a 60 and maybe 30 minute addition and see what that brings.
#Edited to fix up the image.