You typed catholic vs mormon because two pins looked like church and you need a door this weekend. They are not the same Sunday.
Searchers say Mormon. The map and the lander usually say LDS or Latter-day Saints. Same family of pins. Different rooms from a Catholic parish.
The difference that actually changes your morning is Mass vs sacrament meeting, and what happens when the trays or Communion come around. Not a 40-tab theology war.
What the hour usually feels like
Catholic Mass has a predictable shape. Stand, sit, kneel with the room. About 45 to 75 minutes for a typical parish Mass. The order is familiar week to week even when the music changes. Logistics for a first Mass live in Catholic Mass first visit. Confirm times the same day you go. Confirm service times before you leave the driveway.
An LDS Sunday usually centers on sacrament meeting at the meetinghouse. Sitting, hymns, talks, and the sacrament of bread and water. Ward culture can feel more like a weekly gathering of a local congregation than a Mass. First-visit logistics live in LDS sacrament meeting first visit without rewriting that post here.
If a parish Mass is what you want, start on Catholic church near me. If a Latter-day Saint meetinghouse pin is the hunt, open LDS church near me.
Communion / sacrament is the loud visitor tell
Catholic Communion is ordinarily closed for visitors who are not Catholic. Stay in the pew or receive a blessing with arms crossed where that is offered. That is normal, not rude. Details in the Mass first-visit post and in Communion as a visitor.
In sacrament meeting the trays usually pass for a remembrance sacrament. Bread and often water. Visitors are commonly welcome to sit through it. Taking or passing is your call. Listen to the people around you. Do not invent the house rule from a stock photo.
Soft note: the Catholic Church does not accept LDS baptism as equivalent. That is a real institutional line. It does not need to be the first-visit fight. It does explain why the pins are not interchangeable.
Meetinghouse vs temple (do not mix the pins)
The first-visit LDS pin is almost always a meetinghouse / chapel for Sunday sacrament meeting. Temples are a separate track with different preparation and access rules. Do not drive to a temple photo on Maps and expect a drop-in Sunday hour.
Catholic first visits are parish Mass. Cathedrals are still Mass, just bigger rooms. The lander still starts you at a parish pin.
Baptism and who decides
Catholic initiation is sacramental. Infant baptism is common, then First Communion and Confirmation later. Adult converts take a parish path. Check the listing instead of guessing from a font photo.
LDS baptism is usually immersion around age eight for children raised in the faith, or later for converts. Local wards sit in a stake structure. Leadership and teaching come through the Restored Church frame, not a Catholic diocese.
If the denomination line looks messy, how to read a church listing is the decoder.
One belief note, then stop
Catholic teaching holds Trinity, closed canon, and Tradition alongside Scripture. Latter-day Saint teaching speaks of the Godhead and continuing revelation with an open canon. Succession vs Restoration is a forever argument. Skip it for visit number one. You need a door and a start time.
Pick a lander. Go once.
You do not need a forever church from a comparison post. You need a door.
Parish Mass, closed Communion norms for visitors, diocese/parish cues: Catholic church near me.
Meetinghouse sacrament meeting, LDS / Latter-day Saints on the pin: LDS church near me.
City or ZIP. Open a listing. Confirm the time. Go once. Then decide if you go back.