Perhaps I missed it, but if the OP is all about speed, or, all about comfort - there may be differing answers?

Some reading I have been doing talks about skinny tires vs fat tires, and that for surfaces less than perfect, the fatter tires actually produce both better comfort and higher speed due to their ability to deflect the bump (or whatnot) rather than the skinny tire bouncing over it.

Over on BROL this topic has been hashed out for many months, with the result leaning to fatter tires.

I switched from 100PSI 20x1.5 Marathons (kept at full pressure) to Big Apples 20x2.00 at 60PSI, and have not lost any speed, and the ride is much more comfortable.

Of note to the OP - you must also consider if fatter tires will even fit on your ride - but I thought it is something to consider and/or read about.