Outside of the basics of analysis, Golden Cheetah is nothing like Strava.
Strava is a social network, map-based ride reviewer, heatmap tool, and basic ride analysis tool. GC is a not-great map viewer and VERY deep ride data dive tool for training.
A venn diagram for the two would only overlap by about 15%.
Personally I find the "social" aspect of Strava off-putting.
Running for me has always been a solitary pursuit. Making it "social" and letting you know that BigDave69 ran that segment faster than you or whatever totally jars with the whole ethos for me.
That's actually my least favorite part as well. I like being able to see what friends did and use that info for routing, but I have to be careful. If I start flipping through the feed on a day (or week) when I'm not riding I'll start to feel like I'm not living up to some expectation. Mentally that's very, very unhealthy.
Strava is a social network, map-based ride reviewer, heatmap tool, and basic ride analysis tool. GC is a not-great map viewer and VERY deep ride data dive tool for training.
A venn diagram for the two would only overlap by about 15%.