Lemme CnC these >_O
1.
Big focal problem, imo. There's hardly any depth so my eye's aren't very happy looking around for a focal all around the place. Fix that, with some Gaussian layers or them tools! The strong cyan colours are awesome, but they are so bright they feel like a focal. So bring them closer to the render. Atleast the one to the right. There's also a bright light at the under left corner, wich also is to bright. So my eyes go berserk :/. Remove that one, it's kinda unnecessary and ruins the overall tag alot.
I like the overall lightning on the render, however i'd like to see it's lightsource somewhere.. It's a gold light reflection, but the lights around the render are cyan and..white.. There's one part wich is impossible for me to grasp. This one right here:
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I put a circle around a part wich is impossible. Look at the cyan light on his shoulder, it should well..reflect cyan light from his armor, however it's reflecting gold light. It's kinda, wtf O_O. I also highlighted the white light dot that i want you to remove in the corner there.
Overall colours are great, and i want to say i like the lightning overall but..there are some parts that needs to improve like i said.
Need better focal job! Maybe a text aswell..
2.
Weaker colours, but slightly better focal job. . .
Good that you put a lightsource above the render, so the reflections have a good reason to be there xd. Blending is nice, but undynamic. There are some parts that are blended well with C4D and some parts that aren't blended at all.
I suppose the logo is from google? Anyway, it needs to be placed slightly ontop of the render. It'd provide a feeling of a better blended render where it is necessary and it'd create a better focal overall. Instead of two focals :/.
Some of the random shapes in the air needs to be more blured. They're to sharp to fit in, i think. Also, it feels like 80% of the tag has a reflection from the lightsource, but the logo doesn't. It is a big part of the tag, so it needs to feel more blended, so make a reflection on it that syncs with the lightsource.
That is all. Overall, ok but you can do better.