Can I change ramps 1.4 to 1.6 without making changes in the firmware?

I have an old printer and I have the firmware
The ramps 1.4 freze and I want to exchange with ramps 1.6.
if I flash the firmware, will the printer still work the same or do I need to make changes in Marlin?

This is not the correct forum for this question. Sorry I do not know which one to recommend.

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