This is in my opinion good stuff Remedy, the best one I've seen from you.
I adore the colorscheme and the flow goes very well with both their poses and the history these brothers have together.

My two suggestions are following:
Change the fonts to ones that are cleaner, clearer and easier to read. That's a good guideline for all text on graphics, especially such small pieces as tags.
The top right C4D stands out from the rest of the effects in a negative way. Paint over it or swap it to match the rest of the smooth paint looking effects.

Great one Remedy!