Mdkarm Version 543a Better

This is where the "better" aspect is subjective.

If you are still on a legacy OS, you will need to stick with Version 542c. However, for 98% of modern users, the upgrade path is seamless. mdkarm version 543a better

However, for all mainstream Cortex-M0, M3, M4, and M7 targets (STM32F4, LPC55xx, SAMD21, etc.), version 543a is arguably the most polished pre-5.50 release. This is where the "better" aspect is subjective