I recently got my Sun Chaser into the overhead bin of a Horizon Q400!
That bag has worked well for me since I got it. When I was trying to make the same decision, I emailed Red Oxx and got a personal explanation of why the Sun Chaser was a better choice for my needs. The 2 outside pockets work well for me and the floor padding helps the bag to keep its shape when lightly packed.
On the other side of the bag from the 2 pockets are 2 zippers which when opened allow you to put the bag over the handle of a rolling bag. Yes, but I also use that pocket for non-valuables such as newspapers.
My Sun Chaser has had hard use and shows no wear at all. It picked up an odor on one trip but aired out well.
The color of the inside of the bag is the same as the color of the outside so choose your color to meet your needs.
I use a Lil Roy in the same color as my Sun Chaser and/or a Nomad shave kit to act as areas for items that I don't want easily seen by others. Works a charm!