I can't say I share the like. It doesn't seem to significantly add to the effect of the glycinate form. And apart from hurting the wallet it's headachy and vaguely nauseating. It looks good on paper for sure, but in practice all that seems to do is explain its price tag.
The glycinate has an effect on its own by the way, which makes it particularly suited for ketamine aftercare. It's a co-agonist of the NMDA receptor, which could be stronger than the conditional antagonism by magnesium itself, and down-regulate the up-regulated cochlear receptors in spite of glycinate's effect on the nervous system in general, which is acting as a (in my case welcome) ever so slight downer.
So the threonate form could be preferable as preventive option if you want to avoid sedation (and anything resembling NMDA-agonism) at all cost, and you don't notice its head and stomach load. Apart from that, it does kick in faster. Those are the only pros I can think off. So I'd advice against.