I like both sealed and ported cabs... I have a few Mesa ported cabs, but also own a pair of Acoustic B410 cabs - and like them, too... IMO, the pair of them stacked match up very well with the venerable Ampeg SVT810e - which has graced many a pro stage over the years... FWIW, I've owned at least 3 Ampeg SVT810e cabs over the years, and gigged thru a ton of them on provided backlines - so I'm quite familiar with them...
One advantage sealed cabs have over ported is that they tend to be more "punchy", but roll off a little low end - which can make it easier to hear yourself on stage, and less likely to cause issues with the PA regarding low end - IMO/IME, that is...
If you like your sealed Fender 410 cab, adding another is only going to make things better - and give you somewhat of a modular 810 setup - not a bad thing, IMO/IME...