When I use the Claymore directly I get 166MH/s in rig, but when using Awesome Miner (claymore) I get just 158MH/s.
Where does the difference go?
I think you need to compare the command line options, if you use any specific fine tuning on your command line that isn't added to the command line configured in Awesome Miner.
If you first stop the miner, you can use the Diagnostics button in the toolbar. This will open up a window and it will include information about command line and configuration. If you find some optimization missing, you can open the Properties of the Managed Miner, go to the Command line section, and add it.
The only difference is these orders: -etht 1000 -mode 1 -ftime 1
I've added it but I just got on 158MH/s.
Have you tried this multiple times and you always get the same result? Once Awesome Miner started the Claymore software, Awesome Miner is no longer involved in what is going on. It's totally up to the Claymore software to initialize and run based on the command line information.