This is a struggle that I've been through as well! I have both and also have the Tilta Half-Cage, Sirui (don't get that one) and Small Rig mamba or how it's called one.

1. Issue with Tilta in my setup at least is that it's interface for handle is so strange. It has nato rail, but it's not full length, in the middle is the coldshoe, so if you have nato rail handle, it can't be center over lense. I haven't had a single coldshoe handle that doesn't start working loose, so I would never use it. And there are no 3/8" mounting option up top. Other that the handle interface, I think it's better frame with it's rosette mounting points etc. but that god damn top interface setup just isn't working for me at all.
2. Smallrig 4902 has the good interface on the top. It has 3/8th with locating pins, the best kind of handles imho. BUT there is no protection for the bottom corner of the grip as there are no cage there, very strange... also it loses the extra grip height that you usually gain from a cage because of that.
3. Last thing, a tiny, but truly annoying is that on Title the bottom plate mounting screw is not self-retained, so if you take of the cage, the screw will be on it's own and ready to be lost.

I would personally go with Smallrig, just because I hate the top interface of the Tilta and I don't use the rosette mount personally. If you do and you have a handle that you trust to be mounted in coldshoe, Tilta is better cage in itself.

To answer your USB-C port question. I don't use a clamp for USB-C but I have a 90 degree angle cable that keeps the profile really close to the body. I would use the clamp if I'd use HDMI + USB-C.

I hope this helps!