TTS is an outdated toy that has not been updated for about a decade and a half.A very basic set of very mediocre sounds and controls. Does it do GM? Sure. But it's absurd to compare it with Halion/Sonic.

With Halion you can swap sounds from their 30gb library if you don't like their GM soundset. With TTS you are stuck with 18 year old sounds. Most likely you are comparing a Sonic that you got for free VS TTS...
Even a free version has enormous advantage over TTS.

In defense of TTS, it has a light footprint, but that's not very relevant even with average computers these days.

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Let OP decide what is what. If TTs suits his needs, great.

P.S. Peter Gannon suggested TTS in 2018 (5 years back) I guess mainly
because it was an easy and free option. With Sonic, you had to jump a few hoops as if I remember it correctly...