It’s the Small Pipe Organ that’s too sharp.
Overall, almost everything in Halion Sonic SE that was taken from HalionOne could use some reprogramming.
Several sounds are out of tune, use too much cutoff (or the wrong filter velocity response), or use the wrong settings compared to the Motif Classic presets that they were supposed to imitate.
The Halion team could use the MOTIF-RACK Voice Editor for reference. This gives you access to all parameters used in the original presets even if you don’t have the original Motif around. Most of the presets have been renamed in HalionOne and Halion Sonic SE, but you can figure out which is which by looking at the samples used.
I think this is a big deal. A lot of people don’t know that Halion Sonic SE sounds very different from Halion Sonic, so ideally these old sounds should be made as usable as possible to avoid turning off potential buyers.