Germany is more expensive (unless you go with a phone contract from the local grocery store - which I've heard mixed reviews about)

ALDI TALK offers EU-wide unlimited calls & SMS with 60 GB of data for 69.99 EUR per year. That is 5.80 EUR per month for unlimited calls/SMS and 5 GB of data [0]. I switched last year from O2 (they use the same network) after I realized that I only used more than 3 GB of data in two months during the last 3 years. I essentially cut my mobile phone costs by 70% for the same service. Compare to the O2 bloatware, the ALDI web interface is lightweight, fast and simple.

For 8.25 EUR/month, you get 250 GB of data per year, and for 12.40 EUR 450 GB/year.

[0] https://www.alditalk.de/jahres-paket

The grocery store plans are fine. There aren't any QoS tiers on mobile data networks in Germany to my knowledge, so the prioritization you get is just as good or bad as the 100€/month corporate plan sharing the same cell tower with you.