Without spending hours explaining things - I've retyped this message about six times already...
A SC-55, SCC-1, SC-155 is the same synth with different forms of input or purposes. This is facts.
Do not compare a soundfont to a synth. Never compare a soundfont to a synth. The synth will win, as it is the real deal hardware. Soundfonts replicate the sound of a synth. scc1t2.sf2 uses... let's be honest, probably uses GM.DLS as its baseline with a few tweaks. GM.DLS was provided by Roland for Microsoft. GM.DLS contains samples from a SCC-1.. which is a SC-55. gzdoom.sf2 (SC-55 Preset as it is called) also probably uses a tweaked GM.DLS to make it sound as 'organic as possible'. As in, you can throw anything at it and it'll sound decent.
Patch93 probably sourced recordings from the internet or their own synth of different notes for each of the 128 instruments+drums to get the real deal SC-55 sound. But, again. It will never compare to a real synth. There are other soundfonts out there, like EmperorGrieferus's SC-55 which sounds closer to my actual synths.
Actual synths? I own a SC-55ST and a SC-88ST, and am in the market to get an SC-8820 or SC-88ST Pro. I primarily use my SC-88ST in SC-55 Map Mode for Doom. I am a stickler (like, a bad stickler) for MIDI sound - something that my friends have heard me go on about for hours. Since I got these synths, I haven't used a soundfont since. But I can offer a link:
https://www.youtube.com/watch?v=ZZjAn-X3YU4
Check out Doomkid's video, which has multiple recordings of a SC-55 soundfont up against E1M1/At Doom's Gate.