I really like both racquets but I lean more toward the Dunlop 400 Tour. Although both offer things I enjoy, the 400 Tour is geared more to what I like. I feel like it's more manuverable, which is great for my forehand and serve. The 400 Tour is also more powerful; I feel like I can get more cheap points with this racquet than the Rebel 98. I think spin is great with either, especially with a full bed of polyester.
I will say that the Rebel 98 is more arm friendly. After hitting a few days in a row with the Dunlop 400 Tour, I can feel tenderness in my elbow and shoulder. I probably should be using softer strings or at least a hybrid, but I love the feel and spin potential of polyester too much! The Rebel 98 is more forgiving for those off-center shots (which I tend to hit more than I care to admit, but I'm sure you know nothing of off-center shots
)
As for feel, the 400 Tour feels more crisp and there's more feedback. The Rebel, even though it has more feel than old Speedports or O Ports, has a softer, more muted response.
Hope that helps!
Jason, TW