The SIMMs are completely different, but if they have the same humber of the same chips they will work the same way.

You've only photographed one side, but both have 8 km44c4104ck-6 4Mx4 16Mbit chips on them. That's 16MB on one side. If there are 8 identical chips on the other side, they'll be 32MB in total per SIMM. If not, it's 16MB per SIMM, 32MB for the two.

Yes both are double sided.
So I don't need to return and these 2x would work OK in a BANK ?
- Any idea what brand names are these combs ?

The SIMM is itself is just a piece of PCB, so long as the traces are good it's not relevant for performance or compatibility - it's the chips that determine that. No idea as to the brands.

So yes, if both have 16 4Mx4 chips on them, they are both double-sided 32MB SIMMs (note: "double-sided' doesn't refer to chips physically on both sides, but to 64 data lines per SIMM, as opposed to 32 for single-sided - usually that means chips on both sides, but not necessarily) with the same structure, so will work together. If they are good.

Anyone recognize this logo of a Germany RAM maker ?

Just for the record: while the Pentium 1 needs pairs of PS/2 modules due to its 64-bit data path, there is no such thing as dual channel, interleaving, or similar. That means you can use completely different modules without any issues. There's no rule saying that you must use matching pairs. As long as they meet the required specs, they will work.

Some of the Simms I bought have extremely thin small surface mount looking RAM chips.

Not sure if this was common or just EOL chip work
The specs of these modules was nothing special but they looked interesting