According to many cross-overs, the "Caroline In The City" universe is the same that the "Cheers" universe. However, John Ratzenberger's characters in both shows are different.
The name of the cereal company is Dartland Foods (referring to Caroline and the City writer Dottie Dartland).
This episode sees the second mention or "Sincere Amore" - the love you never have to question. Caroline and Richard both realize that Stella and Vick have that kind of love.
According to many cross-overs, the universes of "Caroline In The City" and "Cheers" are the same. However, Keene Curtis's characters in both shows are different.
Richard tells the story of his jacket being stolen while his sister watched. The sister is not given a name and is never mentioned again, not even in any of the episodes where Richard's parents appear.
This is the first mention of Julia, the love of Richard's life who broke his heart. Julia would later return at the end of series 2 and throughout series 3. It's also the first mention of "Sincere Amore" the love you never have to question, which would crop up again on a few occasions.
It could be considered an early indication of a connection between Caroline and Richard that Richard mentions Sincere Amore to Caroline and then she uses that as a reason not to be with Del only a few minutes later.