Hmm, tough one that. I actually prefer the FH5 for comfort to be honest - the shallower insertion is just that much less intrusive. But it does mean you have to find tips that sit well and seal well. The FA7 with the right tips is also very comfortable, but I find tips that go too far into my ear canal uncomfortable. These things are so personal! Apparently the new black FH5 has slightly deeper insertion so you may want to look into those, or wait and see what the FH7 are all about in March.