This new one is better. I used yours for a while some time ago and it's extremely annoying that the collapsed comment is not aligned to the rest of the comments at the same depth. Gives you a weird feeling that you collapsed the parent and the next one is its child. When you randomly collapse comments the result may be a mess where you're not exactly sure who answered to who.

Also, your collapse/uncollapse button is placed on the right instead of left so its X position may vary, making it a bit more difficult to collapse comments in a series.

Good effort though.