Bottom end, sealed dual 10" vs ported dual 8"?

This may be an impossible comparison but I am trying to compare what I have now with what I may buy on paper. I currently have dual 8" subs built into my tower speaker (powered) and ported. I am looking at going a different direction and moving to dual 10" subs (powered) in a sealed enclosure. The question is with the rest of the system being equal how will these compare?

Thanks