Major differences after garmin syncs to strava?

I always expect these two to be a bit off since I know they use different algorithms etc, but I just ran a 5k and they’re giving me drastically different times. I was using it as a very easy warm up into my 14 mile long run so i certainly wasn’t booking it, but there’s a 6 minute stretch in the middle where garmin says I was running at a 13 min/mile pace and strava claims 7:55 pace. If I had to ballpark, my pace felt around 9:20, but was certainly neither of those two extremes. The total average pace for the entire distance is also off by a full 45 seconds, 9:10 (strava) and 9:55 (garmin). What gives??