I’ve studied the pictures and I could almost swear it’s him, that’s how close the resemblance is. One hitch might be the jawline whisker growth seen in the shooting aftermath video - not clearly present in the robbery still photo from 4 days prior - the question is whether 4 days would have been long enough to grow that much, and I think it’s very possible.
I’ve seen pics of the gun laying on the street next to Castile’s car from some distance after the incident, and it’s definitely not the same gun as seen in the robbery.
I agree the facial hair seems different...but the robbery photos aren’t very clear.
Also, I think thete is something long and thin in the background that makes the gun look longer than it really is.