Puzzle #164: Gemini Loop

I was going through my puzzle files and realised I had a few unused puzzles that I had written for the WPC 2013. One of each type was used, but for certain types I'd written a few just to have a choice depending on how they tested. I had posted two sets of puzzles before, that I had originally written for the WPC, but these puzzle types were rejected. These puzzles were the following Yajilin and Pentopia puzzles.
Today's puzzle is a Gemini Loop puzzle. I think it's a nice puzzle but I selected the other one for the WPC as I thought that one solved a bit nicer.

Rules:

Draw a single closed loop through all squares in the grid by connecting them horizontally and
vertically. The loop doesn't touch or cross itself. Cells with the same letter all have the same
appearance as to how the loop passes through it. Cells with different letters have a different appearance.