Fishing patterns with P70Rs?

[Tizor]

I am looking forward to purchasing a new EV-200 AP system very soon. I have a power boat and place value on the ability for the AP to run pre-programmed patterns for trolling. The marketing materials clearly state that the P70Rs (with it's rotary knob) is for power boats, while the P70s (pushbutton course correction instead of rotary knob) is for sail boats. I actually think I prefer the push button course corrections over the rotary knob for my navigating. So my questions are...

1) Is the P70s head unit capable of executing the pre-programmed fishing patterns?
2) Is there any good reason (other functionality, etc.) that I should opt for the rotary head with a power boat - even though that's not my first choice?

Thanks very much for any feedback or guidance.