That was quick, the double-cd arrived today and is just playing over my headphones. Yes, the two songs of Glenn with Tony were outtakes of "Fused" as it says in one of the articles. Nice booklet with some explaining words to each song. Couldn't resist to take a photo of the page for "Slip Away":
To "Let It Down Easy"
Tony wrote: "Another rarity only available in Japan, we were looking for a straight ahead upbeat track and this is the result! I'd like to say thank you to Glenn Hughes for agreeing that these tracks could be used for this CD."