Thanks for your replay!
I do not think the zip attached files are visible for other than Teltonika.
Both devices are tested with the same configuration running the same services. CPU/Load/RAM wise also seems really good, see screenshot below but thanks for the tip.
With limited traffic/operation with OpenVPN i see no issue and running for months without issues. But when using WebUI or trying more intense traffic (>1500kbps) the bad unit stands out. During such traffic the CPU load is between 10 and 16 % so i cannot see anything severe. When disabling all services and fresh install and just handling the WebUI I see major difference between the two devices in performance. With a fresh install also, the camera is streaming nicely on the good one but nearly not showing anything on the bad (same config/streaming options.). This is the same situation as my full setup.
The good unit:
Mem: 63228K used, 61604K free, 272K shrd, 6444K buff, 20084K cached
CPU: 12% usr 8% sys 0% nic 75% idle 0% io 0% irq 3% sirq
Load average: 0.27 0.38 0.28 2/73 9158
The bad unit:
Mem: 64116K used, 60716K free, 216K shrd, 6388K buff, 20160K cached
CPU: 11% usr 7% sys 0% nic 77% idle 0% io 0% irq 3% sirq
Load average: 0.25 0.34 0.25 1/65 17740