Hartmut DB6LL once again made another comparisation chart (tnx). It includes the new Q65 mode. I publish it here with permission.
I didn't try Q65 myself yet. If you like you can download the first release candidate of the WSJT-X software featuring Q65 here. If you compare Q65 15s with FT8 it could do a 3dB better decode which is a huge difference. Some people think that Q65 will take over FT8 on HF, but personally I don't think so. FT8 occupies "only" 50Hz. Q65 15s will occupy 433Hz. You can fit 8 different FT8 signals in one Q65 transmission. So, I really doubt this mode will get populair on HF. However for EME, troposcatter, rainscatter etc. this is a interesting development.
A Q65 quick start PDF can be dowloaded here.
Updated this post 5-Feb-2021 with a new chart.
Updated this post 6-Feb-2021 wih a new chart due to an error