Thoughts and prayers.
Send My Love To John was about Rina's friend's mom who did not accept her son for his queerness due to her religious beliefs. It was written in the perspective of the mother, which was based from a phone call between her and Rina's friend. The phone call ended with "send my love to John," as in, the friend's boyfriend and this was said after years of her not being able to accept her son for who he is.
X-Static Process is about Madonna's existential crisis and confusion about herself, her identity and the world around her. With everything that has happened to her, she takes the time to reflect about her life through this somber and raw song.
Personally, there are indeed similarities in terms of the guitar but we'll never know until someone on Rina's team would confirm or deny it. Both songs, at the end of the day, sound beautiful.