FreeSync Premium Pro, the highest tier, has exclusive access to high dynamic range and wide color gamut support. To clarify, FreeSync and FreeSync Premium features may not work when HDR is turned on due to processing bandwidth issues. Or they may work at the cost of inconsistent HDR performance (your PC, console, or monitor may need to disable HDR to keep FreeSync features working). At any rate, the two lower tiers of FreeSync work independently of HDR, while FreeSync Premium Pro integrates HDR on the hardware level. That allows you to enjoy every FreeSync feature we’ve mentioned plus better HDR performance. That’s because the hardware-level negotiation between your monitor and PC/consoles gets a helping hand from the FreeSync Premium Pro process, alleviating some of the computational burden. If you want to game with HDR on, FreeSync Premium Pro is the best choice. If shopping for a DisplayHDR-certified monitor, you should try to get one with FreeSync Premium Pro to better leverage its capabilities.
FreeSync Premium Pro should be the only choice anyway because all levels of FreeSync remain “free” in essence. AMD doesn’t charge monitor makers for the technology, although obviously the additional processing components do have a cost. But as a royalty-less technology, you may as well get the highest tier because the price difference tends to come out unsubstantial. Bottom line: since HDR in games will only increase in importance, FreeSync Premium Pro will become the baseline eventually, and you should aim for that.
Do remember FreeSync tech overall isn’t mandatory and you can have an excellent gaming experience without it. FreeSync doesn’t generate graphics processing power, rather it helps your hardware platforms and refines their behavior. Furthermore, HDMI 2.1 and DisplayPort 1.4 on their own deliver native variable refresh rate without any additional technology needed, independent of FreeSync or G-Sync, and they’re set to become much more popular. No matter what, the future looks good for smooth gaming with consistent framerates, so there’s cause for joy there.