In an Apples to Oranges example, I have a local Jeep Rubicon that I look after from time to time, they installed a SC without regearing, then went about adding bumpers, taller tires, winches and every other gizmo they could find. Then they wondered why it was sluggish on the highway, got lousy gas mileage and kept throwing computer codes even with a programmer.
Your SC would be better tuned to your Tacoma so maintenance and compatibility would not be a problem, but unless you know and weight everything you will possibly add to the truck in the future (plus the additional wind drag), your projections of RPM and speeds and fuel mileage are going to be shortsighted. As mentioned the stress on the rest of your drivetrain is going to become compounded with the growing need for RPMs of the SC, you will begin to have to really weight any additions to the truck versus your goals.
The gears would put less stress on fewer drivetrain parts, and if you go to an even lower ratio like the 4.88s then you could always add a taller tire or (kind of more weight) to bring you down to the numbers you are trying to hit, so almost an excuse to add more stuff
00 Jeep Wrangler 4banger
Custom bumpers, Warn M12000, Heavy skidplates
Former Rock Junkie reformed to the Overland life.
07 Jeep Wrangler Unlimited
Custom bumper, Custom Rack, Superchips programmer, OME Heavy lift, AEV Correction brackets, Warn VR10K, Fox Shox, Michelins.