External SSD vs Internal SSD performance

Hello everyone, so I wanted to upgrade my older late 2012 iMac as my backup computer for video editing. I was just curious to the performance aspects of an external ssd vs internal ssd(specifically Crucial MX500 1TB SATA 2.5-inch 7mm Internal SSD vs Samsung T5 1TB external SSD). As far as the read and write speeds they are pretty similar. As far as the connection, I'm not sure how that may impact the performance(usb 3 vs thunderbolt vs sata). I don't care about any other aspect of the drives except performance! Which one will perform better/faster for video editing in Premiere Pro? Thank you in advance, please help!