There was a comparison in delegate numbers between Clinton-Sanders in 2016 vs. Biden-Sanders in 2020. As I feel the comparison isn't great, as different states voted now in Super Tuesday, I made instead a comparison table of the states that voted so far and their results in 2016 vs. 2020.
As it is now a two-way race (sorry Tulsi), I compared Sanders in both cases with Clinton and Biden respectively and gave Biden the same color as Clinton. I marked delegate count for states in 2020, which are still incomplete. Data is from Wikipedia:
https://en.wikipedia.org/wiki/2016_Democratic_Party_presidential_primaries
https://en.wikipedia.org/wiki/2020_Democratic_Party_presidential_primaries
If I look at this, it gives an inconclusive picture. Sanders won now Nevada and California compared to 2016, but lost Maine, Minnesota and Oklahoma. He has a bigger share of delegates from Texas this time around, but a smaller one in Massachusetts. I can't say if it goes better or worse for Sanders this time around, as different states shifted in different directions.
But feel free to read into the data whatever you find. 
