Difference between jailbreaking an iPhone and an Ipod touch?

What is the difference between jailbreaking an iPhone and an Ipod touch.
I'd rather buy an Ipod as it's a lot cheaper but if the iPhone is a lot better then that will be the way to go. I'm not bothered about calling people. I just want an apple device which I can use everyday and jailbreak in the future.
Is there a difference between the jailbreaks.
The devices are similar just the iPhone has no ability to call people and has no 3G/4G.

Nothing. Effectively the same method for both.