Both are BLs with a light-hearted tone. Love By Chance is less comedic and more serious, but still has its funny moments. Both have lead's who are explicitly gay, rather than 'gay-for-you' and supportive mothers who play a role in the series.
Same actor. Same comedic/light tone. Both are short, easy entertainment. Puppy Honey has two main storylines with a straight couple featured as well, but if you're not into that it's also easy to skip through and still follow the BL.