Hi, Don I think the Airfix kit is an early war E-boat with the Revell being an S100 from 1943 and on. I got the Airfix off of ebay...pretty cheap. The Revell was more. Each has it own strong points. I think both are quite detailed. The airfix has great carly floats and the Revell has much better weaponry...lot of windows in the Airfix. The Revell is best below the waterline. I would not have wanted to go one on one with either of them with any or the allies boats. One look at the hulls and you can see that the German boat would be way less effected by rough seas...not to mention the flammabilty issue