I've used both, and I don't see much difference in rendering time. The most important thing you need is a computer that can handle the processing as quickly as possible....the software can only do so much for you, in terms of rendering time.
I moved this to the video editing / software discussion forum. ^_^
For me, the big annoyance with Final Cut Pro is that it crashes if you click too many things before it renders. That's mostly my computer not being powerful enough, but I'd imagine it'd be easy to over-click and crash the program with most computers. I've usually ran into this problem when I have lots of layers for something such as a complex greenscreen effect. Once it crashes, it usually has only auto-saved up until the last time it finished rendering.... There is no "save button," just an auto-save mechanism.
I'm not sure what Adobe Premier does if someone over-clicks tasks, but it's something to consider! Lots of YouTubers complain that FCPX crashed and either corrupted the file or lost their work. x_x
I have used both. I have not noticed much difference between the two. For a 15 min long video i am normally looking around 40 mins render time. I try to stick to premier pro as i am more confident in the software. also like how easy it is to go into audition for removing background noise.
I’ve been using Premiere Pro. I haven’t used Final Cut, but most people I’ve talked to prefer Premiere over FCP.
My videos are of pretty high quality, color graded, etc...and I don’t have the fastest computer so my render times can be crazy long sometimes. But I just let it sit overnight so it’s all good haha