Advice: Offer from JetBrains vs PureStorage in Prague

New grad with a Master's here, looking for some perspective.

I have an offer from JetBrains for a 3-month internship. Recruiter says it'll likely convert to full-time, but nothing guaranteed. I'm also in final rounds for full-time position at Pure Storage, but still waiting to hear back. The recruiter at JetBrains wants my decision now.

Overall, JetBrains seems like a nicer place to work. They seem to be very selective, the interview wasn't particularly difficult though. Pure Storage had a much more demanding process, which makes me think the comp might be higher, but the benefits aren't as good. Hard to compare salaries directly since levels.fyi has almost no data for Prague for JetBrains.

Any advice from experienced people?