Is there a difference between 3.73 locking rear axle & 4.30?

You all have given me great information. Spoon059 you made a very good point. Xtech you brought up something that has been in the back of my mind. To get the 4.3 rear I would have to order the truck.

I test drove the F250 today and it did feel sluggish compared to the Tundra, but the overall ride was about the same. I also noticed the steering in the F250 is a lot stiffer. I am told that was a 2017 change Ford made. Again, thank you all for your input!