I haven't heard from "Brown Beer" about a joint brewing session (I've probably scared him off?) so I'll go it alone. This will put "Silver_is_Money's" water calculator head-to-head with "Bru'n Water" … In the right corner:
… and in the left corner we have:
I've never used acid to fiddle with mash pH before. so that will be interesting. "Bru'n Water" has a pleasanter user interface than "Mash Made Easy", but "MME" is young and that might change? The quantities of brewing salts is very similar as should be expected. I was at a bit of a loss with "MME" because it doesn't include "Magnesium Chloride" which has become a firm favourite with me, but I shuffled the salts to use "Magnesium Sulphate" to maintain a level playing field. The water profile I'm copying is BW's "Yellow, dry" one - a low mineralised "American" style for an American style beer. Rather than a highly mineralised UK type profile for a more characterful British style "Real Ale" beer (that'll get me some hate posts!).
I'm using "imaginary" anhydrous Calcium Chloride; I must change to "liquid" CaCl2 additions, and both calculators accommodate it.
The big difference between the calculators is mash pH prediction. I've jiggled the amount of acid additions to be the same but BW predicts pH 5.26 whereas MME has been asked to get pH 5.35. This time I've more faith in MME because BW has been predicting way too low recently (hasn't always been the case, and in 2018 I always had mash pH come out 4.9 - 5.2 but they were mucking about with the water treatment works I find out later).
Next the recipe builder (I'm using Beersmith). Note the beer's name? "Melyn" ("Mel-un" if you like) is Welsh for "Blonde". Remember, I'm "emulating" the BIAB method, and you see "low alcohol" a lot because it's my "low alcohol" fermenting method I'm testing out with an "average alcohol" content beer:
It'll take me a few days to collect the ingredients together (I don't keep a stock of these "lager" type ingredients). The place name for my water doesn't give away where I live, (Llandychmygol); it's a joke (ask a Welshman).
<1600: Edited for typing slip ups>