Yeah, you really need to just look at the spec sheet/monitor reviews to see how good the Freesync is and its features because many of them have very similar features to Ultimate without the added cost (and without the fan if the noise bothers you).If you've never had gsync at all don't rule any out that aren't ultimate and are compatible, I've had a mixture and couldn't honestly tell the difference between one having the module and one not having it.
Rtings has a review LG 34GP950G-B would it be the same monitor? Sais freesync and gsync in it as they tested.
gsync ultimate = no tearing down to 20hz or less and no tearing even after overclocking/overdriving the monitor
side effects: fan noise