I had a Lijun & 1980 and really loved it, as you said it was dense with firm, springy backbone, scrubby without scritch and built lather fast. I've had a FS in Silver-Tip, though it was a different Grade, it lacked density & backbone though the tips were nice and soft, worked nicely for Creams. Between the two, I'd pick the Lijun always, i've never tried an Ace, I'd say they're just as good as the TGN knots I own and would likely buy one again if I needed a Brush.
Besides V-L Horse Hair brushes, I own two Shavemacs and a couple of TGN Badgers; Black & Best, so my experience with other well known manufacturers are limited. I do love the Shavemac knots and the ability to Customize my Brush handle & knot.
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