Yes, the 75% tops will provide better backbone.
I have the 1305 and the 1800. I feel like the 1305 is more badger-like in it's softness and backbone, while the 1800 isn't quite as soft, is quite softer than you would expect a boar to be. I agree with the other comments about the 1800 being good for hard soaps. The 1305 really is great all around though and if I had to only pick 1 of the 2, it would be the 1305. It can lather up creams and soaps equally well and in my opinion, just looks really nice.
did you keep the 1460 in your rotation?
I have a 1305 and an 830. I am 95% of the time a bowl latherer and use creams or 'crops' most of the time. Hands down, the 1305 is my favorite brush. I use it so much I got rid of my Simpsons Duke 3. I will also mix it up with the 830, but although it's just fine for my uses, it seems like it is even better suited for harder soaps and/or face lathering.
Well, I finally ordered a Semogue 1438 from Vintage Scent. The reason is because I already have a Niva Turkish boar that is pretty soft and not a bad bowl-latherer, with dimensional specs pretty much matching the 1800 mentioned at the start (although the Niva knot is much more like an undyed, unbleached Omega knot, but with a flatter head). So, for face-lathering, the smaller 1438 seemed to make more sense after all. 1800 vs. 1305 would make for an interesting comparison, though, regarding the tops question. Thanks again to all for helping me here.
Last edited by Alum of Potash; 06-02-2012 at 01:08 PM. Reason: conjunction change and addition of parenthetical commas.
Wales is not like Arkansas in any way (with apologies to John Cale).