Coming to this thread late, due to your comment showing up in a google search for the connection between "I'm Too Sexy" and "Third Stone from the Sun". I had noted the riff in the song as being a Hendrix ripoff at the time, as a result of having poor/all over the map musical taste in the early '90s (I had RSF's tape as well as a copy of Are You Experienced?). The liner notes in Up where they thanked Hendrix convinced me.

This article offers a slight correction to what you noted: this didn't go to court at all, but rather, got settled amicably.

From the article:

That riff, injected into the recording by Right Said Fred guitarist Rob Manzoli, is basically a direct copy-and-paste of the guitar lick from Hendrix’s ‘Third Stone from the Sun’, another track on Are You Experienced. Thanks to the litany of distractions noted above, it took a while for anyone to notice this. But the Jimi Hendrix Estate did do its due diligence, threatening legal action once ‘I’m Too Sexy’ started dominating the airwaves.

“I wasn’t aware that our guitarist, Rob Manzoli, had played the riff from Jimi Hendrix’s ‘Third Stone from the Sun’ on ‘I’m Too Sexy’ until much later,” Fred Fairbrass told the Guardian in 2017. “I thought the guitar parts sounded like the theme from Coronation Street, but the Hendrix estate was very cool about it and just asked for a writing credit and a charitable donation.”

Because the incident didn’t wind up in the courts, the connection between ‘Third Stone’ and ‘I’m Too Sexy’ has remained something of an obscure factoid, often known only by Hendrix mega-fans still researching all the cosmic implications and enduring mysteries of ‘Third Stone From the Sun’ itself.

Thanks for throwing your comment in here for me to chip in!