These two effects are very similar, however the method is like 100% different.
Stigmata pros
Can be done completely impromptu, or with just a deck ofd cards, or a business card.
Very easy
Wayne is a great teacher
You can make anything appear on you wrist
You can perform it twice in a row using the other arm.
Amazing effect
Stigmata Cons
It's harder to do for people with a darker skin color, however still possible.
Tagged Pros
You can make anything at all appear on heir arm.
You make the word appear on the spectators arm.
Rich is a good teacher.
The effect is probably the best on the market.
Tagged cons
You will almost definatley have to buy something extra.
You must construct a gimmick that you need with you to perform.
You have to set up the gimmick right before performing.
You must practice this to be perfect at.
Hope that helps!