Nurse, please take my temperature

Yes, I'm back with another question
A quick and simple one this time.

I'm going to replace the thermostat as mine is seized open. But the temperature stamp on the top is no longer visible.
An extensive google search seems to suggest that I need an 82c one, but the 74c one also seems to be designed for the 2.25 diesel and is listed as a part for it. So, am I OK to go with the hotter one? Is there a reason the cooler one is available? (perhaps for hot climates or something?)

Most people go for an 82 if they have a choice in a (futile) attempt to get some warmth out of the heater

Ah, OK, so it's a personal preference thing?
Either will be fine, but most people go for the 82. Makes sense.
I don't actually have much problem with my heater, though I will likely overhaul it at some point. Even had to have the window open when driving it today as I was getting too warm. The heater controls are stuck on hot :S