The 2004 "Limited" Tacoma seats are basically the regular buckets with 2 add-ons for the driver's side - an electric lumbar support and a manual seat (bottom) cushion tilt adjustment. Frankly, I don't recommend them - in general, the seats are as klunky as any Taco OEM seats, the lumbar doesn't provide any meaningful support, and the seat bottom's relatively short front-to-back length makes the tilt adjustment pretty ineffective.
In a recent thread over at YotaTech, a bunch of us generally agreed the most comfortable seats Toyota ever put in a truck were the SR5 multi-adjustables in the late 1980's and pre-Taco 1990's.
4Runner, Camry, Corolla, and Celica seats are at best a '3 out of 4 hole' direct fit. Some fabbing / tweaking is required to finish off the install.
Whatever you do, remember: The seats are the easy part - it's the install that'll have you tearing your hair out...