Ever since then, I always have the worst-case scenario in mind when making a purchase decision. So if all other factors and pros/cons even out, I may take engine swap into consideration of the final decision, in case if one costs a lot more than the other (for same engine swap, because other options like LS swap may not be feasible in Cali so far). Unless the law changes and CARB goes away...
The Tundra / Sequoia engines are cheaper. Not by that much, but they are.
More importantly they are more plentiful simply due to higher sales volumes. There are stories here where there's been many many months of downtime while the owner searches for the right 200 motor. I'd assume that going with the Tundra / Sequoia there will be less downtime and many more motors available (with a good warranty from a reputable yard).