1000 Years of Reverbs

Why would somebody choose Live 9 Convolution Pro instead of, say the paid version of SFZ? There's a 4x difference in price ( I think, unless the reverb is seperable from Live 9 )

( I mix with a different reverb, print a reverb channel mix, then use a convolver I wrote that's not a plugin. It's not nearly as horrible of a process as it sounds :) )

It's all sunk cost here; I don't take clients. I will record (mainly live) for friends if they ask and can put up with the process. Most just wanna cellphone video.