Now, GHQ ships are a bit different from Langton's in a number of ways. They tend to be a little bit smaller than their Langton equivalents, and they usually sit lower in the water. On that point I think GHQ probably has the advantage in historical accuracy. GHQ's hulls also tend to be a little crisper in detail.
However, the most significant difference is in the masts and sails. Unlike Langton, GHQ offers no brass sails (or ratlines) and the sails are usually molded in one piece with the masts. The masts themselves are flimsier than Langton's which has definite effects on how one has to go about the rigging process.
I've mounted this model on a trimmed down piece of resin sea base (from Langton) and added davits to the rear from which to suspend the ship's boat.