Hi there,
I know that the major difference between L2A and L1C data is that the former is atmoshperically corrected.
When I howeverd download L1C data from Sentinelhub using a WMS request I can also get L1C data atmospherically corrected. Simply by using custom_url_params={CustomUrlParam.ATMFILTER: ‘ATMCOR’}.
So what is then is the difference of requesting L1C data with CustomUrlParam.ATMFILTER: ‘ATMCOR’ and requesting L2A data?
We expect ESA to soon start providing L2A data on the global scale (last estimate was end of September 2018) and we will be providing these data within Sentinel Hub as well. We do however expect that archives will not be processed for quite a while, so only new data will be available in this way.