As above, use the recommended fluid!, its only got to go wrong once and its game over.
The compressability (or inability to compress, as it were) of brake fluids does not tend to change, our jets use bog standard hydraulic oil as brake fluid and they will generally touch down at 120kts, biggest difference will be in the general makeup of the oil (be it mineral OM15, synthetic or otherwise), the boiling point and compatibility with the various rubber seals and gaskets in your system.
as for the brands, all brake fluid will have a conformity of sorts, in that it must pass a series of criteria to be safe for use, therefore regardless of wether you use Castro Dogsbolox or Halfrauds own brand, it will still do the same job safely.