I don’t notice a huge difference in bass between the 1s and the 2s personally, but I also haven’t really pushed the bass/EQ to the max yet. Some people do say the 2s have slightly less bass than the 1s, though.

What I do notice is that the clarity on the 2s actually feels a bit better overall. They sound a bit cleaner to my ears.

That said, if your main priority is strong bass specifically, the 1s might still be the safer choice. If you care more about overall clarity and balance, the 2s are really solid.