Hi !

Sometimes it's not easy to make the difference between the two, mainly with wild flowers.
Look at the bloom, both have 5 petals but:
Pansy: side petals are UP
Violet: side petals are down
The foliage is a good way too.
Great site :-) Go on and share those nice pics. Your field pansy is definitively a PANSY: U're right :-) But don't ask me which one (I don't like them much)
If you can't identify a viola (pansy or violet) U can post the picture here :-)

Take care :-)
Thierry.