Congratulations Bitcoin SV node developers on the successfu…

Here is the first new block mined with the original rules:
https://whatsonchain.com/block-height/620538

Congrats!
Is there any difference from original protocol?

Yes, there are some minor differences. The difficulty adjustment is still different, for instance. But qualitatively, BSV is now closer to the original than BTC, because segwit and small blocks are more radical regressions.

what is different about the difficulty adjustment?

It varies continuously instead of once every two weeks.