The TM4C123GH6PZI7: It runs at 80 MHz with a hardware floating-point unit, so PID loops and sensor fusion math don't bog the main loop.
The FPU processes float operations in hardware — no software emulation penalty, so you can run sensor calibration and filter coefficients in native float without burning cycles. Compared to the F280041PZQR (100 MHz C28x core, automotive grade), the TM4C123GH6PZI7 trades a bit of top speed for the Cortex-M4F ecosystem — more compiler support, larger middleware pool, and a wider selection of engineers familiar with the architecture. The F280041 targets automotive and AEC-Q100 applications; the TM4C123GH6PZI7 is the industrial-control workhorse with a broader peripheral mix (USB OTG, more I/O).
Package and field-service reality
Housed in a 100-LQFP (14x14 mm), this is a part you can swap in the field with a hot-air station and some practice — no BGA rework, no X-ray inspection. Surface-mount only, so plan for a reflow profile or a controlled hot-air process.