How to start remote Safari Technology Preview from Selenese Runner Java - selenium

Question

I have here a Selenium Hub and a Selenium Node with Config:
{
"capabilities":
[
{
"browserName": "safari",
"version": "10",
"maxInstances": 1,
"webdriver.safari.driver": "/Applications/Safari\ Technology\ Preview.app/Contents/MacOS/safaridriver"
}
],
"proxy": "org.openqa.grid.selenium.proxy.DefaultRemoteProxy",
"maxSession": 1,
"port": 5555,
"register": true,
"registerCycle": 5000,
"hub": "<IP>:4444",
"role": "node",
}
If I try to start a test from a Maven project with the code:
SafariOptions safariOptions = new SafariOptions();
safariOptions.setUseTechnologyPreview(true);
safariOptions.setUseCleanSession(true);
DesiredCapabilities capabilities = DesiredCapabilities.safari();
capabilities.setCapability(SafariOptions.CAPABILITY, safariOptions);
RemoteWebDriver driver = new RemoteWebDriver(
new URL("http://172.31.4.70:4444/wd/hub"), capabilities);
System.out.println(capabilities.toString());
System.out.println(safariOptions.toJson().toString());
driver.manage().window().maximize();
driver.get("https://check24.de/kredit");
//Close the browser
driver.quit();
On the MAC, the Safari Technology Preview starts no problem.
The Selenium Hub log:
14:02:03.874 INFO - Got a request to create a new session: Capabilities [{browserName=safari, safari.options={technologyPreview=true, port=0, cleanSession=true}, version=, platform=MAC}]
14:02:03.898 INFO - Trying to create a new session on test slot {seleniumProtocol=WebDriver, webdriver.safari.driver=/Applications/Safari Technology Preview.app/Contents/MacOS/safaridriver, browserName=safari, maxInstances=1, version=10, platform=MAC}
Now I'd like to start that with Selenese Runner Java with
java -jar C:\selenium\selenese-runner.jar --driver remote --remote-url http://<ip>:4444/wd/hub --remote-platform MAC --remote-browser "safari" --define "safari.options={technologyPreview=true, port=0, cleanSession=true}" --screenshot-on-fail C:\selenium\screenshot --max-time 600 --baseurl %1 %2
The log on the Seleniu Hub is the same:
14:05:26.088 INFO - Got a request to create a new session: Capabilities [{browserName=safari, safari.options={technologyPreview=true, port=0, cleanSession=true}, version=, platform=MAC}]
14:05:26.102 INFO - Trying to create a new session on test slot {seleniumProtocol=WebDriver, webdriver.safari.driver=/Applications/Safari Technology Preview.app/Contents/MacOS/safaridriver, browserName=safari, maxInstances=1, version=10, platform=MAC}
But a Safari (NOT Technology Preview) instante starts on the Selenium Node.
The different is that one send the safari.option with safariOption Class and one send it with plain text.
I cannot understand why there is defferent.
Have you any Idea?
Thanks!
Lian Shen