If it matters I went with the Wiha. I had the Klein and Wiha I purchased and also the Veto lined up side by side.
Here’s how they stacked up to me. The Klein had the most room but was also the poorest quality. It’s no sturdier than the Swissgear laptop bags I use currently and can see it going south with the added weight of a few more tools.
The Wiha is right in the middle on storage volume and quality. It has a nice side pouch I can store my meter in which is great and is heavier construction than a standard computer bag.
The Veto was the best built but also the worst to carry a PC. It has a PC sleeve but not enough space to carry cables I need nor my meter well. It also has a weird metal piece that transfers weight from shoulder straps to the carry handle that has to be removed to open the PC compartment. It’s the smallest overall and fell over on me twice just getting the PC in and out. It’s basically a tool bag with a PC sleeve.
I recently had an employer change, and the Everki I suggested previously would not work for carrying and organizing tools (which I mentioned), even though it was absolutely great for carrying enough tech bits for a mobile office.
I pretty much went through the exact same things mentioned in this quoted post.
I had previously purchased the same Veto Tech Pac LT, and experienced the same issues. There's absolutely no room for much more than a small charging brick in the same laptop stowage area. Veto has the best, by far, accessory storage pockets for other office stuff like pens and there's another sleeve for a tablet or clipboard, but this compartment really needs to be 1" deeper. There is pretty much the same issue on the tool side- there needs to be an additional 1" of space front to back. It's well made, and it is heavy when empty.
The extra piece that must be disengaged to access the laptop side is just about the most irritating thing ever.
The Klein backpack offers next to zero protection for the laptop, but it is better than the otherwise interesting Welkinland 76 pocket backpack. The one big plus on the Klein is the contrasting interior color.
I did look at the Milwaukee structured backpack, but did not experience anything to justify the Milwaukee tax. The earlier model has a lot of bad reviews about the zippers being poor quality.
In the end, I decided on the Wiha 91689. If it had the same laptop organization as the Veto Tech Pac LT and the contrasting color inside like the Klein, it would be awesome. It has that little bit of depth in the laptop and tool stowage area that makes it much more useful, IMO, than the Veto LT. However, the provided storage in the laptop area that's on the zippered door is useless for anything with any depth. I wound up putting the charging stuff for the laptop on the opposite side in the compartment with the Wiha logo.
This one probably has the best laptop protection because there is a plastic cage around the perimeter of the bag. One side of the zipper is on a rigid piece, and the laptop is recessed into this area. A similar setup is on the opposite side. I really don't care about all of the MOLLE strapping on the outside.
The Veto Tech Pac EVO is about 2" deeper than the LT bag, and it isn't exactly cheap. It comes with one interior panel that I wouldn't want, forcing me to buy another $100.00 part. There's only one place around me that would actually have one of these in stock to look at, but it would have to be totally awesome to justify being 2x the cost of the Wiha once it's all said and done.