It doesn't matter. SH is SH. How deep you cut doesn't change that, nor does it reflect how much emotional pain you are in. Most people who cut stick to cat scratches but a lot of people who hang out a lot on online SH communities don't realize this, since those places tend to parade around those who engage in more moderate-severe forms of it.
Still, I sometimes find myself wishing that cut deeper and longer. I sometimes look at past pictures of my SH and feel like it isn't invalid because it isn't deep or wide enough. Most of my deeper cuts involve me cutting down to the top of the fat layer. I've only cut into that layer once. That's the thing that annoys me the most. It doesn't matter how aware you are about how bullshit the whole "deeper and wider you cut = SH is valid" narrative is. Even if you understand that there is always that part of you that believes it and that wishes that you cut deeper, even though no matter how deep you cut you know that you'll always feel like your SH is invalid. I don't feel like I had cut deep enough. Even though I had a nurse comment on how deep my SH was before, it still doesn't feel like enough. I always find myself now regretting not cutting down to the fascia. I hate it, but there isn't much I can do about it.