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What is the difference between Quantopian data and the quantopian-quandl bundle

Hello everyone,

I have been looking around but there are some things that are not entirely clear:

1 - the schedule_function is used every 15 minutes (which can be changed), so then what 1 minute data does quantopian use? Is it the same one from quandl, if so I would consider getting it for my own local backtester.

2 - does anyone know how to what is inside the quantopian-bundle and the difference between the prices? Because I ran the same algorithm in quantopian and locally i get two different results.