I used to charge more for diamond tiling due to the fact that you're probably not going to find two cuts the same. On a floor the price went from £28 per meter to £40!!!!
I tiled MANY diamond floors.
You can charge the right price for your labour if you justify this reasons to the customers. On the same note though, if you don't think yourself that the charges can be justified you'll never be able to charge higher prices.
Square tiling only is easy peasy and the cuts go down a dream. Diamond can be a pig to setout to
standard and to cut all the shaped tiles accurately and tidy WHILST keeping up your speed to earn equal to a days square tiling.
Similar with brickbond too, that can slow you down a little but I doubt i'd charge more for it if it wasn't a
tile with a serious bevelled edge which can again get tricky to keep it looking flat for example.
Grouting with flexi is slower than normal due to the setting / working time so again, a 50 meter job has now had an hour or so added on so you need to absorb the extra labour time in the pricing somewhere.
What that price list does is point out the extra work per jobs and gives a guide to what you can justify charging extra for. The prices could be just a guide in your area but they're not far off right in my opinion.
If you had a price list like that and stuck to it (even if the prices were a % cheaper allround but with the standard fixing charge similar to the one shown) you'd not loose out on many jobs I can tell you.