Emissive vs Rect Light to simulate studio softbox

Simulating a photo studio with large overhead softbox. AT the moment using a large emissive texture.
Can any lighting experts explain the pros and cons of using a large emissive texture vs an actual Rect light?
I am using both precomputed and real time GI (Nvidia RTX GI) for real time playback and Path Tracing for my renders.
Any feedback appreciated!