Apologies in advance: I don't have either of these. Feel free to skip my opinion.
On paper, these ratchets both look like beautifully made versions of outdated designs. Can't think of any reason why I'd give this kind of money for this technology.
For auto repair, I'd recommend a long flex head soft grip LIKE the Snap On FHLF80. That's a great ratchet. These std size ratchets compared above aren't long enough to benefit from fine teeth or high strength. Get the cheapest model you can in this size. This is why so many Americans can defend their love of the crappy plastic HF ratchet. In that length, you really don't need much to be useful. Its good enough.
Also outdated is the European 1/4 and 1/2" drive model. No way I'd buy a set that skips 3/8" drive. 3/8" is now strong enough. You don't need the clumsy 1/2" drive tools for most jobs. When you NEED 1/2", I vote Snap On SHLF80A (or a suitable substitute) and a battery impact and all impact sockets.
I'd buy Hazet or Koken sockets in a heart beat. Beautifully made tools. I love Hazet's style, sets, tool box inserts. Why don't more US manufacturers catch on to that? The packaging is the storage solution. So great. I recall recommending Hazet's design ethos to both the new reformed SK and Tekton (which did some of this). Embrace the colors, the sets, the packaging. Sell to enthusiasts. You don't need to be stronger to sell. Be cooler looking. (just my 2 cents)
Hazet/Stahlwile/Gedore all follow the DIN for wrenches are are subsequently short (outdated). Snap On normal length wrenches are much longer than the DIN spec Gedore make nice extra long pattern wrenches. I'd look there for sure. But the extra long Gedore are only about as long as Snap On's long pattern (doesn't matter).
Long tools are relatively new. In the old days, manufacturers didn't make long because guys could break them. Our materials and processing, machining, forging, broaching are all better now. Germans, like other European manufacturers have stuck to traditional and worked hard to perfect the old designs. They also aren't necessarily big enough to innovate and test. Americans lose sight of the shear size of Snap On. It's an enormous global tool manufacturer with a large engineering and R&D dept in Kenosha. Not fair to compare much smaller companies like Hazet.
Koken is unique in that, being Japanese, they have a high value for perfecting (revering) the traditional (e.g their ratchets). But they are simultaneously excitingly innovative in their sockets. And they aren't a huge company so kudos for bringing real innovation and technology to market (e.g. zeal).
If I were still in Europe and looking to buy euro tools, I'd probably choose Hazet, but their long flex head ratchet is like a 30 tooth model??? What gives? 1970 was 50 years ago. Choose Snap On or Matco or anything modern. You may not feel a difference between high end sockets, but you sure will with ratchets,