If you're going for a still frame, I would add every bit of lines, red squares and text in AE while compositing.
If it has motion and the text/red squares bend as they glide the letter's side, you'll have to add them in c4d as textures. (the red squares bending seem to be rendered in c4d as they are being reflected on the surface of the letter).
As for the geometry I see 5-6 different extrusions and one cut out reflective plane. Everything has soft round edges. 2 base materials, one black reflective. One glassy. Another material for the glowing ring rim (added with post) I don't see different shades of red anywhere.
seems to be lit from the top/back/left with a single light.
For the compositing, The white color bleed on the left and the red color bleed on the right seem to be added in post, since they removed the overall contrast of the image.