So the ILI9488 and most other TFT libraries writen or ported to Teensy is using SPI interface, but I found a ILI9488 320*480 TFT display with a nice capacitive touch.

The problem is it only have 16 bit parallel interface broken out. I am planning to use the 8 bit mode. I "could" do port manipulation, setting all 8 pins' state in around 4 clock cycles.

Here's my problem:
Is SPI fast enough/faster than parallel interface?
Can SPI do full frame update quickly?

I am not sure if I have the skills to port from existing Arduino parallel library / mod Teensy SPI library.

Any ideas?