I imagine the difference is so small that it's not even worth considering if you have one and a better trinket from SoO. If you have both then I'd probably stick with HLG, especially if you prefer the 13153 Haste Breakpoint.
Horridon's is one of the few RPPM trinkets that the proc rate still scales with haste. With the 13k haste build, the 510 version was regen-ing more mana than my innervates were at the time (prolly 12k ish spirit back then). So a 543 is definitely gonna smash a Chi-Ji