I've had a fusion for about 9 months and altho it is exceptionally comfortable, I'm just too high. I was looking at the J3 with the top padding being grey and course. I'm wondering if that padding is as soft as the white padding on the fusion? Doesn't look like it. I'm confused. I feel like if I go with the J2 or the union its just gonna be too soft and I'll bottom out or bust the gel/air insert.