difference between a single more powerful sub vs duals of less power

2013cossj

Hello all, happy holidays.

I just sold my old SVS PC Ultra to a friend and looking to buy a new sub/s.

Use - 99% HT
Room - 4000 CF

I’m contemplating either…
2 PB-2000

Or…
1 PB-3000

Thoughts on the difference between a single more powerful sub vs duals of less power?

Thanks

Emlyn

Best explanation here on what benefits of dual subwoofers is:

https://www.youtube.com/watch?v=OXVpy5jaNsk&t=73s

pearsall001

Without a doubt if budget allows go with dual subs.