Unless you’re shooting straight on a wall in an otherwise dark room, you’ll never notice the difference. You should literally ignore it for the purposes of purchasing. Pick the flash with the features and cost that make sense.

https://youtu.be/1HmPMgdjjjU?si=2vdm3WN63nMBC0bb

Love this guy’s product photography videos. Here’s one with a watch.

Definitely a sling bag. The backpack with the side opening is bet6than what you have, but the zipper honestly takes too long. This is exasperated if you’re traveling with someone and want to grab a quick photo.

Backpack with the side pouch let’s you carry other stuff and is more secure and normally more discrete. If you go this route I recommend wandrd provoke bag. Have it and love it. The peak design bag is very nice too.

I should note a sling can start to hurt your shoulder on a long day, esp if you throw a water bottle in there or other things. I have a timbuk2 bag, but they apparently don’t sell it anymore (“snoop”)