What is the difference between these two threads?

[Sockeye guy 0]

Danville Flat Waxed Nylon 210 denier and Flymaster Plus 210 denier? Both are waxed and the Danville website does not say much about it.

[flytire 0]

flymaster plus is a twisted nylon thread. waxed and unwaxed

 

flat waxed nylon is flat

 

from the interweb (http://frontrangeanglers.com/choosing-the-right-fly-tying-thread/)

 

Flat Waxed Nylon. This is a very popular thread for saltwater flies. It has very little twist and it lays very flat. It is strong enough for hair work. The fluorescent colors are bold. Waxed; 15 colors.

 

Flymaster Plus. This is similar to Flat Waxed Nylon, but it has more twist. It is a good thread for hair and large flies. Bold colors. Waxed and unwaxed; 21 colors.

[johnnyquahog 0]

For years I used Danville flat waxed nylon for saltwater patterns like clousers, deceivers, flatwings, blondes and so on. It lays down flat so you don't get that oversized head and provides a smooth surface for painted or stick on eyes. After watching the M. George vid on stacking deer hair I got a few spools of the flymaster+. Mike creates amazing bugs with very few controlled wraps of this thread. After using it on a handfull of bugs I went back to gsp 200 which I just perfer more for what I am doing. So in summary, the threads have different characteristics which make them more suited for particular applications.

[whatfly 0]

Effectively, nothing. As Norm points out, Flat Waxed Nylon has less twist than Flymaster+, but considering that you can always spin your thread to flatten, the difference is minor. I use the two interchangeably, although Flymaster+ comes in more colors, so I have more of it.

[Sockeye guy 0]

Thanks to those who replied and thanks for the link on thread. I have learned much from it!