OMG, finally someone else! I did a short one-shot fanfiction about Nu52 Red Robin vs pre-reboot Red Robin a while back. It's more an introduction to the concept of the nu52 trying to overwrite the pre-reboot with "better" work. I focused more on pre-reboot Red Robin and telling it kinda from his POV.
I liked your shadow works here and the facial expressions are nicely different. Rather than just having them both be angry and fighting, they seem to look different.