its completely scalable.
you have the same realism settings as in stock.
where the "difficulty" comes into it... is in the AI, as the war progresses, it will be increasingly difficult to outwit the escorts.
Radar plays a more active role than in stock so surface attacks and surface intercepts become very very difficult to pull off - dare i say impossible after mid 1943. additionally guns on the escorts - as in real life - became increasingly radar directed, so they can be devastatingly accurate at long range.
GWX is just more historically accurate - so rather than having the stock 75% chance of surviving the war you have a GWX 75% chance of being sunk.
I survived several campaigns to wars end in the stock version
In GWX, i have managed to survive perhaps two or three campaigns to the end of the war - of course i play on 89 - 100% realism depending on how serious an experience i want.
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