I bought a Hatsan at44 qe and a Marauder .22 at the same time because I could not decide between the two. Was going to sell one, but ended up liking them both so much I've kept them both. Out of the box, I'd say the Hatsan is the better gun. Very accurate, very quiet and I like the detachable air cylinder.
I the Marauder's favor, you have better aftermarket support, a wood stock and it is much easier to tune.
Hatsan's shoot pretty fast out of the box, so I tuned mine down about 20% for more shots.
Today they sell for substantially less than they did when I purchased my at44qe, and user reports suggest that quality remains the same (good).
Good luck choosing.