Hi. I have heard both and decided on the 30.2
The only reason, imo, to consider the 30.2 over the SHL5+, is room size considerations. My room is small, and the 30.2 do nothing to address potential room interactions with first point reflections. They need plenty of space to sound their best. More than what I had. Hence, why I sold them for directional horns.
Anyway, I would reccomend the 30.2 if your room is under 40m3, and the SHL5+ for anything above that.
The SHL5+ is, imo, more full sounding. "Bigger" sound, better dynamics - swings in volume, etc. Better all around. But I knew they wouldn't play nice in my small room. The 30.2 barely did play nice. I'd honestly probably recommend a smaller Harbeth over the 30.2, if your room is under 35m3.