I'm guessing this is for pure dos, since you mention 1993. If benches are needed I have quite a few benchmarks on a VLB 5428 done between DX2-66 @ 33mhz bus up to DX4-120 @40mhz bus I can dig up tomorrow. If you compare that to the youtube video (mentioned below) you'll get some answers. I would use that trio card though.
Another user from Vogons (i think he is) put up a long video on youtube comparing the S3 Trio 64 VLB vs PCI and found the PCI version was a bit slower than VLB. I'll have to find that. Though different manufacturers may have used faster or slower memory.
update: https://www.youtube.com/watch?v=xSf2tetGek4 (if you have spare time)
Second, from what I understand, a Tseng ET4000 W32p will outperform the trio 64 VLB in DOS games, it's certainly not "too fast". Trio 64 will benefit in 2d acceleration (I BELIEVE - due to it being 64 bit) which will give it a nice edge in windows 3.x or win95 over a GD 5428 but you're not looking at much if any difference in DOS, and certainly not going to make any pronounced difference in DOS games. CL GD5432 are 64 bit as well, and only a little faster in DOS AFAIK.
Personal thoughts - Back in the DOS days, there was nothing really special about graphics cards, they were mostly just digital to analog converters with local memory and graphics were driven by the CPU. Your performance will be the CPU and the latency of the video memory basically. The only difference between the cards is how fast you could blast memory to it. MOST DOS games will only write 8 bits at a time, or 16 if the programmer used assembly or inline assembly. DOS4GW games like doom may be capable of more, I don't remember. I highly doubt any DOS games prior to 1993 were programmed to do quad WORD writes to the video memory (64 bits).
For good compatibility, most of us use S3 virge PCI cards in our PCI dos machines, which came after the trio64v+. Hence, I think the trio is just fine for what you're looking to do
If you really want an earlier card.. There are S3 Trio 32 PCI, ATi Mach 32 PCI, some Avance brand cards. Other than that, I don't often see other 1994 PCI cards. 1995 seems to be the big year for them.
Sup. I like computers. Are you a computer?