The Ford F-150 Lightning and Rivian R1T are both electric pickup trucks. They both have lively acceleration, impressive electric driving range, and roomy accommodations. However, they're quite different in a number of ways, and it's almost certain that one will suit you much better than the other.
The F-150 Lightning has a much lower starting price, at around $40,000. However, as soon as you step up a trim level and opt for the Extended Range battery, you're looking at ~$81,000, which is more than the R1T's $73,000 price.