According to multiple resources on VOGONS and the rest of the Internet, my Dell Dimension XPS M200s has an onboard Vibra16C. I also have the AWE32 Wavetable upgrade PCI card installed.

As part of my MS-DOS 6.22 installation, I've been using the latest sbbasic drivers (30 Dec 97) that include the CTSB16.SYS driver (1997-02-20) which I appear to have been using for a while (and without issue, for both devices).

Due to the above driver not providing me an AWEUTIL TSR during installation (even though the driver description specifies an AWE Control Panel is included), I tried out the CT-1920 AWE32 Upgrade Card Driver CD posted here at vogonsdrivers.
During the installation, I noticed the drivers although older than the versions in sbbasic, were set up in a default C:\VIBRA16 directory (as opposed to the regular C:\SB16 directory as done from the sbbasic pack previously).
As well as including the AWEUTIL.COM TSR I was looking for, I noticed the omission of the CTSB16.SYS file in \VIBRA16\DRV, and instead the existence of a VIBRA16.SYS (1996-02-07). Although the AWE32 Upgrade driver CD can provide drivers for both my Vibra16C and AWE32 Upgrade card, some of the other driver files such as AUXDRV.DRV (1995--07-05) are much older than those found in sbbasic's AUXDRV.DRV (1997-03-21).

After testing, the AWEUTIL.COM TSR also seems to work perfectly with the \SB16\DRV\CTSB16.SYS driver.

Given that I have Vibra16C hardware, is it more appropriate for me to be using the VIBRA16.SYS instead of the CTSB16.SYS? Is there any difference?
During testing, I've not noticed any difference. However, perhaps there is something I should be aware of?

I would expect continuing to use CTSB16.SYS would be prudent as it is a later driver, and perhaps offers more support for later applications and games.
However, if the VIBRA16.SYS is more appropriate (for reasons I don't know), then I would happily change.