According to the manufacturer specs the GT 730 GDDR5 can actually handle three displays, although that might depend on how a particular manufacturer has packaged it - whatever, it can definitely drive two monitors.
https://www.geforce.com/hardware/des...specifications
The Geforce 210 will only drive two monitors apparently.
So yes, I'd just give it a go with whichever card is installed. As you've observed, by default the displays are mirrored but fiddling with the configuration as shown in the previous post should give you an extended desktop.