Worth the upgrade to Samsung Q900F from S60D+subwoofer?

Hi all, just gathering y'alls thoughts as I'm not a soundbar expert.

I currently have a Samsung S60D soundbar coupled with the W510 subwoofer. They came bundled when I bought my S90F TV.

I saw the Q900F soundbar with subwoofer was on sale and it caught my eye. It's bigger than the S60D but that's not an issue. All I really see is the Q900F has 2 up firing speakers, which sounds fun as we watch a lot of Dolby Atmos movies and shows.

I'm pretty satisfied with my current setup, but if the difference in quality is going to be a noticeable upgrade then I'm seriously interested.

Can anyone give insight if it would be worth the upgrade?

P.S. Rear speakers aren't really an option for me at the moment, so I'm not looking at the Q990F, however much I'd like to.